Identifier
Identifier
Values
[1] => 1
[1,2] => 1
[2,1] => 1
[1,2,3] => 1
[1,3,2] => 1
[2,1,3] => 1
[2,3,1] => 2
[3,1,2] => 2
[3,2,1] => 1
[1,2,3,4] => 1
[1,2,4,3] => 1
[1,3,2,4] => 1
[1,3,4,2] => 2
[1,4,2,3] => 2
[1,4,3,2] => 1
[2,1,3,4] => 1
[2,1,4,3] => 1
[2,3,1,4] => 2
[2,3,4,1] => 2
[2,4,1,3] => 2
[2,4,3,1] => 2
[3,1,2,4] => 2
[3,1,4,2] => 2
[3,2,1,4] => 1
[3,2,4,1] => 2
[3,4,1,2] => 1
[3,4,2,1] => 2
[4,1,2,3] => 2
[4,1,3,2] => 2
[4,2,1,3] => 2
[4,2,3,1] => 1
[4,3,1,2] => 2
[4,3,2,1] => 1
[1,2,3,4,5] => 1
[1,2,3,5,4] => 1
[1,2,4,3,5] => 1
[1,2,4,5,3] => 2
[1,2,5,3,4] => 2
[1,2,5,4,3] => 1
[1,3,2,4,5] => 1
[1,3,2,5,4] => 1
[1,3,4,2,5] => 2
[1,3,4,5,2] => 2
[1,3,5,2,4] => 2
[1,3,5,4,2] => 2
[1,4,2,3,5] => 2
[1,4,2,5,3] => 2
[1,4,3,2,5] => 1
[1,4,3,5,2] => 2
[1,4,5,2,3] => 1
[1,4,5,3,2] => 2
[1,5,2,3,4] => 2
[1,5,2,4,3] => 2
[1,5,3,2,4] => 2
[1,5,3,4,2] => 1
[1,5,4,2,3] => 2
[1,5,4,3,2] => 1
[2,1,3,4,5] => 1
[2,1,3,5,4] => 1
[2,1,4,3,5] => 1
[2,1,4,5,3] => 2
[2,1,5,3,4] => 2
[2,1,5,4,3] => 1
[2,3,1,4,5] => 2
[2,3,1,5,4] => 2
[2,3,4,1,5] => 2
[2,3,4,5,1] => 2
[2,3,5,1,4] => 2
[2,3,5,4,1] => 2
[2,4,1,3,5] => 2
[2,4,1,5,3] => 2
[2,4,3,1,5] => 2
[2,4,3,5,1] => 2
[2,4,5,1,3] => 2
[2,4,5,3,1] => 2
[2,5,1,3,4] => 2
[2,5,1,4,3] => 2
[2,5,3,1,4] => 2
[2,5,3,4,1] => 2
[2,5,4,1,3] => 2
[2,5,4,3,1] => 2
[3,1,2,4,5] => 2
[3,1,2,5,4] => 2
[3,1,4,2,5] => 2
[3,1,4,5,2] => 2
[3,1,5,2,4] => 2
[3,1,5,4,2] => 2
[3,2,1,4,5] => 1
[3,2,1,5,4] => 1
[3,2,4,1,5] => 2
[3,2,4,5,1] => 2
[3,2,5,1,4] => 2
[3,2,5,4,1] => 2
[3,4,1,2,5] => 1
[3,4,1,5,2] => 2
[3,4,2,1,5] => 2
[3,4,2,5,1] => 2
[3,4,5,1,2] => 2
[3,4,5,2,1] => 2
[3,5,1,2,4] => 2
[3,5,1,4,2] => 1
[3,5,2,1,4] => 2
[3,5,2,4,1] => 2
[3,5,4,1,2] => 2
[3,5,4,2,1] => 2
[4,1,2,3,5] => 2
[4,1,2,5,3] => 2
[4,1,3,2,5] => 2
[4,1,3,5,2] => 2
[4,1,5,2,3] => 2
[4,1,5,3,2] => 2
[4,2,1,3,5] => 2
[4,2,1,5,3] => 2
[4,2,3,1,5] => 1
[4,2,3,5,1] => 2
[4,2,5,1,3] => 1
[4,2,5,3,1] => 2
[4,3,1,2,5] => 2
[4,3,1,5,2] => 2
[4,3,2,1,5] => 1
[4,3,2,5,1] => 2
[4,3,5,1,2] => 2
[4,3,5,2,1] => 2
[4,5,1,2,3] => 2
[4,5,1,3,2] => 2
[4,5,2,1,3] => 2
[4,5,2,3,1] => 2
[4,5,3,1,2] => 1
[4,5,3,2,1] => 2
[5,1,2,3,4] => 2
[5,1,2,4,3] => 2
[5,1,3,2,4] => 2
[5,1,3,4,2] => 2
[5,1,4,2,3] => 2
[5,1,4,3,2] => 2
[5,2,1,3,4] => 2
[5,2,1,4,3] => 2
[5,2,3,1,4] => 2
[5,2,3,4,1] => 1
[5,2,4,1,3] => 2
[5,2,4,3,1] => 1
[5,3,1,2,4] => 2
[5,3,1,4,2] => 2
[5,3,2,1,4] => 2
[5,3,2,4,1] => 1
[5,3,4,1,2] => 2
[5,3,4,2,1] => 2
[5,4,1,2,3] => 2
[5,4,1,3,2] => 2
[5,4,2,1,3] => 2
[5,4,2,3,1] => 2
[5,4,3,1,2] => 2
[5,4,3,2,1] => 1
[1,2,3,4,5,6] => 1
[1,2,3,4,6,5] => 1
[1,2,3,5,4,6] => 1
[1,2,3,5,6,4] => 2
[1,2,3,6,4,5] => 2
[1,2,3,6,5,4] => 1
[1,2,4,3,5,6] => 1
[1,2,4,3,6,5] => 1
[1,2,4,5,3,6] => 2
[1,2,4,5,6,3] => 2
[1,2,4,6,3,5] => 2
[1,2,4,6,5,3] => 2
[1,2,5,3,4,6] => 2
[1,2,5,3,6,4] => 2
[1,2,5,4,3,6] => 1
[1,2,5,4,6,3] => 2
[1,2,5,6,3,4] => 1
[1,2,5,6,4,3] => 2
[1,2,6,3,4,5] => 2
[1,2,6,3,5,4] => 2
[1,2,6,4,3,5] => 2
[1,2,6,4,5,3] => 1
[1,2,6,5,3,4] => 2
[1,2,6,5,4,3] => 1
[1,3,2,4,5,6] => 1
[1,3,2,4,6,5] => 1
[1,3,2,5,4,6] => 1
[1,3,2,5,6,4] => 2
[1,3,2,6,4,5] => 2
[1,3,2,6,5,4] => 1
[1,3,4,2,5,6] => 2
[1,3,4,2,6,5] => 2
[1,3,4,5,2,6] => 2
[1,3,4,5,6,2] => 2
[1,3,4,6,2,5] => 2
[1,3,4,6,5,2] => 2
[1,3,5,2,4,6] => 2
[1,3,5,2,6,4] => 2
[1,3,5,4,2,6] => 2
[1,3,5,4,6,2] => 2
[1,3,5,6,2,4] => 2
[1,3,5,6,4,2] => 2
[1,3,6,2,4,5] => 2
[1,3,6,2,5,4] => 2
[1,3,6,4,2,5] => 2
[1,3,6,4,5,2] => 2
[1,3,6,5,2,4] => 2
[1,3,6,5,4,2] => 2
[1,4,2,3,5,6] => 2
[1,4,2,3,6,5] => 2
[1,4,2,5,3,6] => 2
[1,4,2,5,6,3] => 2
[1,4,2,6,3,5] => 2
[1,4,2,6,5,3] => 2
[1,4,3,2,5,6] => 1
[1,4,3,2,6,5] => 1
[1,4,3,5,2,6] => 2
[1,4,3,5,6,2] => 2
[1,4,3,6,2,5] => 2
[1,4,3,6,5,2] => 2
[1,4,5,2,3,6] => 1
[1,4,5,2,6,3] => 2
[1,4,5,3,2,6] => 2
[1,4,5,3,6,2] => 2
[1,4,5,6,2,3] => 2
[1,4,5,6,3,2] => 2
[1,4,6,2,3,5] => 2
[1,4,6,2,5,3] => 1
[1,4,6,3,2,5] => 2
[1,4,6,3,5,2] => 2
[1,4,6,5,2,3] => 2
[1,4,6,5,3,2] => 2
[1,5,2,3,4,6] => 2
[1,5,2,3,6,4] => 2
[1,5,2,4,3,6] => 2
[1,5,2,4,6,3] => 2
[1,5,2,6,3,4] => 2
[1,5,2,6,4,3] => 2
[1,5,3,2,4,6] => 2
[1,5,3,2,6,4] => 2
[1,5,3,4,2,6] => 1
[1,5,3,4,6,2] => 2
[1,5,3,6,2,4] => 1
[1,5,3,6,4,2] => 2
[1,5,4,2,3,6] => 2
[1,5,4,2,6,3] => 2
[1,5,4,3,2,6] => 1
[1,5,4,3,6,2] => 2
[1,5,4,6,2,3] => 2
[1,5,4,6,3,2] => 2
[1,5,6,2,3,4] => 2
[1,5,6,2,4,3] => 2
[1,5,6,3,2,4] => 2
[1,5,6,3,4,2] => 2
[1,5,6,4,2,3] => 1
[1,5,6,4,3,2] => 2
[1,6,2,3,4,5] => 2
[1,6,2,3,5,4] => 2
[1,6,2,4,3,5] => 2
[1,6,2,4,5,3] => 2
[1,6,2,5,3,4] => 2
[1,6,2,5,4,3] => 2
[1,6,3,2,4,5] => 2
[1,6,3,2,5,4] => 2
[1,6,3,4,2,5] => 2
[1,6,3,4,5,2] => 1
[1,6,3,5,2,4] => 2
[1,6,3,5,4,2] => 1
[1,6,4,2,3,5] => 2
[1,6,4,2,5,3] => 2
[1,6,4,3,2,5] => 2
[1,6,4,3,5,2] => 1
[1,6,4,5,2,3] => 2
[1,6,4,5,3,2] => 2
[1,6,5,2,3,4] => 2
[1,6,5,2,4,3] => 2
[1,6,5,3,2,4] => 2
[1,6,5,3,4,2] => 2
[1,6,5,4,2,3] => 2
[1,6,5,4,3,2] => 1
[2,1,3,4,5,6] => 1
[2,1,3,4,6,5] => 1
[2,1,3,5,4,6] => 1
[2,1,3,5,6,4] => 2
[2,1,3,6,4,5] => 2
[2,1,3,6,5,4] => 1
[2,1,4,3,5,6] => 1
[2,1,4,3,6,5] => 1
[2,1,4,5,3,6] => 2
[2,1,4,5,6,3] => 2
[2,1,4,6,3,5] => 2
[2,1,4,6,5,3] => 2
[2,1,5,3,4,6] => 2
[2,1,5,3,6,4] => 2
[2,1,5,4,3,6] => 1
[2,1,5,4,6,3] => 2
[2,1,5,6,3,4] => 1
[2,1,5,6,4,3] => 2
[2,1,6,3,4,5] => 2
[2,1,6,3,5,4] => 2
[2,1,6,4,3,5] => 2
[2,1,6,4,5,3] => 1
[2,1,6,5,3,4] => 2
[2,1,6,5,4,3] => 1
[2,3,1,4,5,6] => 2
[2,3,1,4,6,5] => 2
[2,3,1,5,4,6] => 2
[2,3,1,5,6,4] => 4
[2,3,1,6,4,5] => 4
[2,3,1,6,5,4] => 2
[2,3,4,1,5,6] => 2
[2,3,4,1,6,5] => 2
[2,3,4,5,1,6] => 2
[2,3,4,5,6,1] => 2
[2,3,4,6,1,5] => 2
[2,3,4,6,5,1] => 2
[2,3,5,1,4,6] => 2
[2,3,5,1,6,4] => 2
[2,3,5,4,1,6] => 2
[2,3,5,4,6,1] => 2
[2,3,5,6,1,4] => 2
[2,3,5,6,4,1] => 2
[2,3,6,1,4,5] => 2
[2,3,6,1,5,4] => 2
[2,3,6,4,1,5] => 2
[2,3,6,4,5,1] => 2
[2,3,6,5,1,4] => 2
[2,3,6,5,4,1] => 2
[2,4,1,3,5,6] => 2
[2,4,1,3,6,5] => 2
[2,4,1,5,3,6] => 2
[2,4,1,5,6,3] => 2
[2,4,1,6,3,5] => 2
[2,4,1,6,5,3] => 2
[2,4,3,1,5,6] => 2
[2,4,3,1,6,5] => 2
[2,4,3,5,1,6] => 2
[2,4,3,5,6,1] => 2
[2,4,3,6,1,5] => 2
[2,4,3,6,5,1] => 2
[2,4,5,1,3,6] => 2
[2,4,5,1,6,3] => 4
[2,4,5,3,1,6] => 2
[2,4,5,3,6,1] => 2
[2,4,5,6,1,3] => 2
[2,4,5,6,3,1] => 2
[2,4,6,1,3,5] => 4
[2,4,6,1,5,3] => 2
[2,4,6,3,1,5] => 2
[2,4,6,3,5,1] => 2
[2,4,6,5,1,3] => 2
[2,4,6,5,3,1] => 2
[2,5,1,3,4,6] => 2
[2,5,1,3,6,4] => 2
[2,5,1,4,3,6] => 2
[2,5,1,4,6,3] => 2
[2,5,1,6,3,4] => 2
[2,5,1,6,4,3] => 2
[2,5,3,1,4,6] => 2
[2,5,3,1,6,4] => 2
[2,5,3,4,1,6] => 2
[2,5,3,4,6,1] => 2
[2,5,3,6,1,4] => 2
[2,5,3,6,4,1] => 2
[2,5,4,1,3,6] => 2
[2,5,4,1,6,3] => 2
[2,5,4,3,1,6] => 2
[2,5,4,3,6,1] => 2
[2,5,4,6,1,3] => 4
[2,5,4,6,3,1] => 2
[2,5,6,1,3,4] => 2
[2,5,6,1,4,3] => 2
[2,5,6,3,1,4] => 4
[2,5,6,3,4,1] => 2
[2,5,6,4,1,3] => 2
[2,5,6,4,3,1] => 2
[2,6,1,3,4,5] => 2
[2,6,1,3,5,4] => 2
[2,6,1,4,3,5] => 2
[2,6,1,4,5,3] => 2
[2,6,1,5,3,4] => 2
[2,6,1,5,4,3] => 2
[2,6,3,1,4,5] => 2
[2,6,3,1,5,4] => 2
[2,6,3,4,1,5] => 2
[2,6,3,4,5,1] => 2
[2,6,3,5,1,4] => 2
[2,6,3,5,4,1] => 2
[2,6,4,1,3,5] => 2
[2,6,4,1,5,3] => 2
[2,6,4,3,1,5] => 2
[2,6,4,3,5,1] => 2
[2,6,4,5,1,3] => 2
[2,6,4,5,3,1] => 4
[2,6,5,1,3,4] => 2
[2,6,5,1,4,3] => 2
[2,6,5,3,1,4] => 2
[2,6,5,3,4,1] => 4
[2,6,5,4,1,3] => 2
[2,6,5,4,3,1] => 2
[3,1,2,4,5,6] => 2
[3,1,2,4,6,5] => 2
[3,1,2,5,4,6] => 2
[3,1,2,5,6,4] => 4
[3,1,2,6,4,5] => 4
[3,1,2,6,5,4] => 2
[3,1,4,2,5,6] => 2
[3,1,4,2,6,5] => 2
[3,1,4,5,2,6] => 2
[3,1,4,5,6,2] => 2
[3,1,4,6,2,5] => 2
[3,1,4,6,5,2] => 2
[3,1,5,2,4,6] => 2
[3,1,5,2,6,4] => 2
[3,1,5,4,2,6] => 2
[3,1,5,4,6,2] => 2
[3,1,5,6,2,4] => 2
[3,1,5,6,4,2] => 2
[3,1,6,2,4,5] => 2
[3,1,6,2,5,4] => 2
[3,1,6,4,2,5] => 2
[3,1,6,4,5,2] => 2
[3,1,6,5,2,4] => 2
[3,1,6,5,4,2] => 2
[3,2,1,4,5,6] => 1
[3,2,1,4,6,5] => 1
[3,2,1,5,4,6] => 1
[3,2,1,5,6,4] => 2
[3,2,1,6,4,5] => 2
[3,2,1,6,5,4] => 1
[3,2,4,1,5,6] => 2
[3,2,4,1,6,5] => 2
[3,2,4,5,1,6] => 2
[3,2,4,5,6,1] => 2
[3,2,4,6,1,5] => 2
[3,2,4,6,5,1] => 2
[3,2,5,1,4,6] => 2
[3,2,5,1,6,4] => 2
[3,2,5,4,1,6] => 2
[3,2,5,4,6,1] => 2
[3,2,5,6,1,4] => 2
[3,2,5,6,4,1] => 2
[3,2,6,1,4,5] => 2
[3,2,6,1,5,4] => 2
[3,2,6,4,1,5] => 2
[3,2,6,4,5,1] => 2
[3,2,6,5,1,4] => 2
[3,2,6,5,4,1] => 2
[3,4,1,2,5,6] => 1
[3,4,1,2,6,5] => 1
[3,4,1,5,2,6] => 2
[3,4,1,5,6,2] => 2
[3,4,1,6,2,5] => 2
[3,4,1,6,5,2] => 2
[3,4,2,1,5,6] => 2
[3,4,2,1,6,5] => 2
[3,4,2,5,1,6] => 2
[3,4,2,5,6,1] => 2
[3,4,2,6,1,5] => 2
[3,4,2,6,5,1] => 2
[3,4,5,1,2,6] => 2
[3,4,5,1,6,2] => 2
[3,4,5,2,1,6] => 2
[3,4,5,2,6,1] => 2
[3,4,5,6,1,2] => 4
[3,4,5,6,2,1] => 2
[3,4,6,1,2,5] => 2
[3,4,6,1,5,2] => 2
[3,4,6,2,1,5] => 2
[3,4,6,2,5,1] => 2
[3,4,6,5,1,2] => 2
[3,4,6,5,2,1] => 4
[3,5,1,2,4,6] => 2
[3,5,1,2,6,4] => 2
[3,5,1,4,2,6] => 1
[3,5,1,4,6,2] => 2
[3,5,1,6,2,4] => 1
[3,5,1,6,4,2] => 2
[3,5,2,1,4,6] => 2
[3,5,2,1,6,4] => 2
[3,5,2,4,1,6] => 2
[3,5,2,4,6,1] => 2
[3,5,2,6,1,4] => 2
[3,5,2,6,4,1] => 2
[3,5,4,1,2,6] => 2
[3,5,4,1,6,2] => 4
[3,5,4,2,1,6] => 2
[3,5,4,2,6,1] => 2
[3,5,4,6,1,2] => 2
[3,5,4,6,2,1] => 2
[3,5,6,1,2,4] => 2
[3,5,6,1,4,2] => 2
[3,5,6,2,1,4] => 2
[3,5,6,2,4,1] => 4
[3,5,6,4,1,2] => 2
[3,5,6,4,2,1] => 2
[3,6,1,2,4,5] => 2
[3,6,1,2,5,4] => 2
[3,6,1,4,2,5] => 2
[3,6,1,4,5,2] => 1
[3,6,1,5,2,4] => 2
[3,6,1,5,4,2] => 1
[3,6,2,1,4,5] => 2
[3,6,2,1,5,4] => 2
[3,6,2,4,1,5] => 2
[3,6,2,4,5,1] => 2
[3,6,2,5,1,4] => 2
[3,6,2,5,4,1] => 2
[3,6,4,1,2,5] => 4
[3,6,4,1,5,2] => 2
[3,6,4,2,1,5] => 2
[3,6,4,2,5,1] => 2
[3,6,4,5,1,2] => 2
[3,6,4,5,2,1] => 2
[3,6,5,1,2,4] => 2
[3,6,5,1,4,2] => 2
[3,6,5,2,1,4] => 4
[3,6,5,2,4,1] => 2
[3,6,5,4,1,2] => 2
[3,6,5,4,2,1] => 2
[4,1,2,3,5,6] => 2
[4,1,2,3,6,5] => 2
[4,1,2,5,3,6] => 2
[4,1,2,5,6,3] => 2
[4,1,2,6,3,5] => 2
[4,1,2,6,5,3] => 2
[4,1,3,2,5,6] => 2
[4,1,3,2,6,5] => 2
[4,1,3,5,2,6] => 2
[4,1,3,5,6,2] => 2
[4,1,3,6,2,5] => 2
[4,1,3,6,5,2] => 2
[4,1,5,2,3,6] => 2
[4,1,5,2,6,3] => 4
[4,1,5,3,2,6] => 2
[4,1,5,3,6,2] => 2
[4,1,5,6,2,3] => 2
[4,1,5,6,3,2] => 2
[4,1,6,2,3,5] => 4
[4,1,6,2,5,3] => 2
[4,1,6,3,2,5] => 2
[4,1,6,3,5,2] => 2
[4,1,6,5,2,3] => 2
[4,1,6,5,3,2] => 2
[4,2,1,3,5,6] => 2
[4,2,1,3,6,5] => 2
[4,2,1,5,3,6] => 2
[4,2,1,5,6,3] => 2
[4,2,1,6,3,5] => 2
[4,2,1,6,5,3] => 2
[4,2,3,1,5,6] => 1
[4,2,3,1,6,5] => 1
[4,2,3,5,1,6] => 2
[4,2,3,5,6,1] => 2
[4,2,3,6,1,5] => 2
[4,2,3,6,5,1] => 2
[4,2,5,1,3,6] => 1
[4,2,5,1,6,3] => 2
[4,2,5,3,1,6] => 2
[4,2,5,3,6,1] => 2
[4,2,5,6,1,3] => 2
[4,2,5,6,3,1] => 2
[4,2,6,1,3,5] => 2
[4,2,6,1,5,3] => 1
[4,2,6,3,1,5] => 2
[4,2,6,3,5,1] => 2
[4,2,6,5,1,3] => 2
[4,2,6,5,3,1] => 2
[4,3,1,2,5,6] => 2
[4,3,1,2,6,5] => 2
[4,3,1,5,2,6] => 2
[4,3,1,5,6,2] => 2
[4,3,1,6,2,5] => 2
[4,3,1,6,5,2] => 2
[4,3,2,1,5,6] => 1
[4,3,2,1,6,5] => 1
[4,3,2,5,1,6] => 2
[4,3,2,5,6,1] => 2
[4,3,2,6,1,5] => 2
[4,3,2,6,5,1] => 2
[4,3,5,1,2,6] => 2
[4,3,5,1,6,2] => 2
[4,3,5,2,1,6] => 2
[4,3,5,2,6,1] => 2
[4,3,5,6,1,2] => 2
[4,3,5,6,2,1] => 4
[4,3,6,1,2,5] => 2
[4,3,6,1,5,2] => 2
[4,3,6,2,1,5] => 2
[4,3,6,2,5,1] => 2
[4,3,6,5,1,2] => 4
[4,3,6,5,2,1] => 2
[4,5,1,2,3,6] => 2
[4,5,1,2,6,3] => 2
[4,5,1,3,2,6] => 2
[4,5,1,3,6,2] => 4
[4,5,1,6,2,3] => 2
[4,5,1,6,3,2] => 2
[4,5,2,1,3,6] => 2
[4,5,2,1,6,3] => 2
[4,5,2,3,1,6] => 2
[4,5,2,3,6,1] => 2
[4,5,2,6,1,3] => 2
[4,5,2,6,3,1] => 4
[4,5,3,1,2,6] => 1
[4,5,3,1,6,2] => 2
[4,5,3,2,1,6] => 2
[4,5,3,2,6,1] => 2
[4,5,3,6,1,2] => 2
[4,5,3,6,2,1] => 2
[4,5,6,1,2,3] => 1
[4,5,6,1,3,2] => 2
[4,5,6,2,1,3] => 2
[4,5,6,2,3,1] => 2
[4,5,6,3,1,2] => 2
[4,5,6,3,2,1] => 2
[4,6,1,2,3,5] => 2
[4,6,1,2,5,3] => 2
[4,6,1,3,2,5] => 4
[4,6,1,3,5,2] => 2
[4,6,1,5,2,3] => 2
[4,6,1,5,3,2] => 2
[4,6,2,1,3,5] => 2
[4,6,2,1,5,3] => 2
[4,6,2,3,1,5] => 2
[4,6,2,3,5,1] => 2
[4,6,2,5,1,3] => 4
[4,6,2,5,3,1] => 2
[4,6,3,1,2,5] => 2
[4,6,3,1,5,2] => 1
[4,6,3,2,1,5] => 2
[4,6,3,2,5,1] => 2
[4,6,3,5,1,2] => 2
[4,6,3,5,2,1] => 2
[4,6,5,1,2,3] => 2
[4,6,5,1,3,2] => 1
[4,6,5,2,1,3] => 2
[4,6,5,2,3,1] => 2
[4,6,5,3,1,2] => 2
[4,6,5,3,2,1] => 2
[5,1,2,3,4,6] => 2
[5,1,2,3,6,4] => 2
[5,1,2,4,3,6] => 2
[5,1,2,4,6,3] => 2
[5,1,2,6,3,4] => 2
[5,1,2,6,4,3] => 2
[5,1,3,2,4,6] => 2
[5,1,3,2,6,4] => 2
[5,1,3,4,2,6] => 2
[5,1,3,4,6,2] => 2
[5,1,3,6,2,4] => 2
[5,1,3,6,4,2] => 2
[5,1,4,2,3,6] => 2
[5,1,4,2,6,3] => 2
[5,1,4,3,2,6] => 2
[5,1,4,3,6,2] => 2
[5,1,4,6,2,3] => 4
[5,1,4,6,3,2] => 2
[5,1,6,2,3,4] => 2
[5,1,6,2,4,3] => 2
[5,1,6,3,2,4] => 4
[5,1,6,3,4,2] => 2
[5,1,6,4,2,3] => 2
[5,1,6,4,3,2] => 2
[5,2,1,3,4,6] => 2
[5,2,1,3,6,4] => 2
[5,2,1,4,3,6] => 2
[5,2,1,4,6,3] => 2
[5,2,1,6,3,4] => 2
[5,2,1,6,4,3] => 2
[5,2,3,1,4,6] => 2
[5,2,3,1,6,4] => 2
[5,2,3,4,1,6] => 1
[5,2,3,4,6,1] => 2
[5,2,3,6,1,4] => 1
[5,2,3,6,4,1] => 2
[5,2,4,1,3,6] => 2
[5,2,4,1,6,3] => 2
[5,2,4,3,1,6] => 1
[5,2,4,3,6,1] => 2
[5,2,4,6,1,3] => 2
[5,2,4,6,3,1] => 2
[5,2,6,1,3,4] => 2
[5,2,6,1,4,3] => 2
[5,2,6,3,1,4] => 2
[5,2,6,3,4,1] => 2
[5,2,6,4,1,3] => 1
[5,2,6,4,3,1] => 2
[5,3,1,2,4,6] => 2
[5,3,1,2,6,4] => 2
[5,3,1,4,2,6] => 2
[5,3,1,4,6,2] => 2
[5,3,1,6,2,4] => 2
[5,3,1,6,4,2] => 2
[5,3,2,1,4,6] => 2
[5,3,2,1,6,4] => 2
[5,3,2,4,1,6] => 1
[5,3,2,4,6,1] => 2
[5,3,2,6,1,4] => 1
[5,3,2,6,4,1] => 2
[5,3,4,1,2,6] => 2
[5,3,4,1,6,2] => 2
[5,3,4,2,1,6] => 2
[5,3,4,2,6,1] => 4
[5,3,4,6,1,2] => 2
[5,3,4,6,2,1] => 2
[5,3,6,1,2,4] => 2
[5,3,6,1,4,2] => 4
[5,3,6,2,1,4] => 2
[5,3,6,2,4,1] => 2
[5,3,6,4,1,2] => 2
[5,3,6,4,2,1] => 2
[5,4,1,2,3,6] => 2
[5,4,1,2,6,3] => 2
[5,4,1,3,2,6] => 2
[5,4,1,3,6,2] => 2
[5,4,1,6,2,3] => 2
[5,4,1,6,3,2] => 4
[5,4,2,1,3,6] => 2
[5,4,2,1,6,3] => 2
[5,4,2,3,1,6] => 2
[5,4,2,3,6,1] => 4
[5,4,2,6,1,3] => 2
[5,4,2,6,3,1] => 2
[5,4,3,1,2,6] => 2
[5,4,3,1,6,2] => 2
[5,4,3,2,1,6] => 1
[5,4,3,2,6,1] => 2
[5,4,3,6,1,2] => 2
[5,4,3,6,2,1] => 2
[5,4,6,1,2,3] => 2
[5,4,6,1,3,2] => 2
[5,4,6,2,1,3] => 1
[5,4,6,2,3,1] => 2
[5,4,6,3,1,2] => 2
[5,4,6,3,2,1] => 2
[5,6,1,2,3,4] => 4
[5,6,1,2,4,3] => 2
[5,6,1,3,2,4] => 2
[5,6,1,3,4,2] => 2
[5,6,1,4,2,3] => 2
[5,6,1,4,3,2] => 2
[5,6,2,1,3,4] => 2
[5,6,2,1,4,3] => 4
[5,6,2,3,1,4] => 2
[5,6,2,3,4,1] => 2
[5,6,2,4,1,3] => 2
[5,6,2,4,3,1] => 2
[5,6,3,1,2,4] => 2
[5,6,3,1,4,2] => 2
[5,6,3,2,1,4] => 2
[5,6,3,2,4,1] => 2
[5,6,3,4,1,2] => 1
[5,6,3,4,2,1] => 2
[5,6,4,1,2,3] => 2
[5,6,4,1,3,2] => 2
[5,6,4,2,1,3] => 2
[5,6,4,2,3,1] => 2
[5,6,4,3,1,2] => 1
[5,6,4,3,2,1] => 2
[6,1,2,3,4,5] => 2
[6,1,2,3,5,4] => 2
[6,1,2,4,3,5] => 2
[6,1,2,4,5,3] => 2
[6,1,2,5,3,4] => 2
[6,1,2,5,4,3] => 2
[6,1,3,2,4,5] => 2
[6,1,3,2,5,4] => 2
[6,1,3,4,2,5] => 2
[6,1,3,4,5,2] => 2
[6,1,3,5,2,4] => 2
[6,1,3,5,4,2] => 2
[6,1,4,2,3,5] => 2
[6,1,4,2,5,3] => 2
[6,1,4,3,2,5] => 2
[6,1,4,3,5,2] => 2
[6,1,4,5,2,3] => 2
[6,1,4,5,3,2] => 4
[6,1,5,2,3,4] => 2
[6,1,5,2,4,3] => 2
[6,1,5,3,2,4] => 2
[6,1,5,3,4,2] => 4
[6,1,5,4,2,3] => 2
[6,1,5,4,3,2] => 2
[6,2,1,3,4,5] => 2
[6,2,1,3,5,4] => 2
[6,2,1,4,3,5] => 2
[6,2,1,4,5,3] => 2
[6,2,1,5,3,4] => 2
[6,2,1,5,4,3] => 2
[6,2,3,1,4,5] => 2
[6,2,3,1,5,4] => 2
[6,2,3,4,1,5] => 2
[6,2,3,4,5,1] => 1
[6,2,3,5,1,4] => 2
[6,2,3,5,4,1] => 1
[6,2,4,1,3,5] => 2
[6,2,4,1,5,3] => 2
[6,2,4,3,1,5] => 2
[6,2,4,3,5,1] => 1
[6,2,4,5,1,3] => 2
[6,2,4,5,3,1] => 2
[6,2,5,1,3,4] => 2
[6,2,5,1,4,3] => 2
[6,2,5,3,1,4] => 2
[6,2,5,3,4,1] => 2
[6,2,5,4,1,3] => 2
[6,2,5,4,3,1] => 1
[6,3,1,2,4,5] => 2
[6,3,1,2,5,4] => 2
[6,3,1,4,2,5] => 2
[6,3,1,4,5,2] => 2
[6,3,1,5,2,4] => 2
[6,3,1,5,4,2] => 2
[6,3,2,1,4,5] => 2
[6,3,2,1,5,4] => 2
[6,3,2,4,1,5] => 2
[6,3,2,4,5,1] => 1
[6,3,2,5,1,4] => 2
[6,3,2,5,4,1] => 1
[6,3,4,1,2,5] => 2
[6,3,4,1,5,2] => 2
[6,3,4,2,1,5] => 4
[6,3,4,2,5,1] => 2
[6,3,4,5,1,2] => 2
[6,3,4,5,2,1] => 2
[6,3,5,1,2,4] => 4
[6,3,5,1,4,2] => 2
[6,3,5,2,1,4] => 2
[6,3,5,2,4,1] => 2
[6,3,5,4,1,2] => 2
[6,3,5,4,2,1] => 2
[6,4,1,2,3,5] => 2
[6,4,1,2,5,3] => 2
[6,4,1,3,2,5] => 2
[6,4,1,3,5,2] => 2
[6,4,1,5,2,3] => 4
[6,4,1,5,3,2] => 2
[6,4,2,1,3,5] => 2
[6,4,2,1,5,3] => 2
[6,4,2,3,1,5] => 4
[6,4,2,3,5,1] => 2
[6,4,2,5,1,3] => 2
[6,4,2,5,3,1] => 2
[6,4,3,1,2,5] => 2
[6,4,3,1,5,2] => 2
[6,4,3,2,1,5] => 2
[6,4,3,2,5,1] => 1
[6,4,3,5,1,2] => 2
[6,4,3,5,2,1] => 2
[6,4,5,1,2,3] => 2
[6,4,5,1,3,2] => 2
[6,4,5,2,1,3] => 2
[6,4,5,2,3,1] => 1
[6,4,5,3,1,2] => 2
[6,4,5,3,2,1] => 2
[6,5,1,2,3,4] => 2
[6,5,1,2,4,3] => 4
[6,5,1,3,2,4] => 2
[6,5,1,3,4,2] => 2
[6,5,1,4,2,3] => 2
[6,5,1,4,3,2] => 2
[6,5,2,1,3,4] => 4
[6,5,2,1,4,3] => 2
[6,5,2,3,1,4] => 2
[6,5,2,3,4,1] => 2
[6,5,2,4,1,3] => 2
[6,5,2,4,3,1] => 2
[6,5,3,1,2,4] => 2
[6,5,3,1,4,2] => 2
[6,5,3,2,1,4] => 2
[6,5,3,2,4,1] => 2
[6,5,3,4,1,2] => 2
[6,5,3,4,2,1] => 1
[6,5,4,1,2,3] => 2
[6,5,4,1,3,2] => 2
[6,5,4,2,1,3] => 2
[6,5,4,2,3,1] => 2
[6,5,4,3,1,2] => 2
[6,5,4,3,2,1] => 1
[1,2,3,4,5,6,7] => 1
[1,2,3,4,5,7,6] => 1
[1,2,3,4,6,5,7] => 1
[1,2,3,4,6,7,5] => 2
[1,2,3,4,7,5,6] => 2
[1,2,3,4,7,6,5] => 1
[1,2,3,5,4,6,7] => 1
[1,2,3,5,4,7,6] => 1
[1,2,3,5,6,4,7] => 2
[1,2,3,5,6,7,4] => 2
[1,2,3,5,7,4,6] => 2
[1,2,3,5,7,6,4] => 2
[1,2,3,6,4,5,7] => 2
[1,2,3,6,4,7,5] => 2
[1,2,3,6,5,4,7] => 1
[1,2,3,6,5,7,4] => 2
[1,2,3,6,7,4,5] => 1
[1,2,3,6,7,5,4] => 2
[1,2,3,7,4,5,6] => 2
[1,2,3,7,4,6,5] => 2
[1,2,3,7,5,4,6] => 2
[1,2,3,7,5,6,4] => 1
[1,2,3,7,6,4,5] => 2
[1,2,3,7,6,5,4] => 1
[1,2,4,3,5,6,7] => 1
[1,2,4,3,5,7,6] => 1
[1,2,4,3,6,5,7] => 1
[1,2,4,3,6,7,5] => 2
[1,2,4,3,7,5,6] => 2
[1,2,4,3,7,6,5] => 1
[1,2,4,5,3,6,7] => 2
[1,2,4,5,3,7,6] => 2
[1,2,4,5,6,3,7] => 2
[1,2,4,5,6,7,3] => 2
[1,2,4,5,7,3,6] => 2
[1,2,4,5,7,6,3] => 2
[1,2,4,6,3,5,7] => 2
[1,2,4,6,3,7,5] => 2
[1,2,4,6,5,3,7] => 2
[1,2,4,6,5,7,3] => 2
[1,2,4,6,7,3,5] => 2
[1,2,4,6,7,5,3] => 2
[1,2,4,7,3,5,6] => 2
[1,2,4,7,3,6,5] => 2
[1,2,4,7,5,3,6] => 2
[1,2,4,7,5,6,3] => 2
[1,2,4,7,6,3,5] => 2
[1,2,4,7,6,5,3] => 2
[1,2,5,3,4,6,7] => 2
[1,2,5,3,4,7,6] => 2
[1,2,5,3,6,4,7] => 2
[1,2,5,3,6,7,4] => 2
[1,2,5,3,7,4,6] => 2
[1,2,5,3,7,6,4] => 2
[1,2,5,4,3,6,7] => 1
[1,2,5,4,3,7,6] => 1
[1,2,5,4,6,3,7] => 2
[1,2,5,4,6,7,3] => 2
[1,2,5,4,7,3,6] => 2
[1,2,5,4,7,6,3] => 2
[1,2,5,6,3,4,7] => 1
[1,2,5,6,3,7,4] => 2
[1,2,5,6,4,3,7] => 2
[1,2,5,6,4,7,3] => 2
[1,2,5,6,7,3,4] => 2
[1,2,5,6,7,4,3] => 2
[1,2,5,7,3,4,6] => 2
[1,2,5,7,3,6,4] => 1
[1,2,5,7,4,3,6] => 2
[1,2,5,7,4,6,3] => 2
[1,2,5,7,6,3,4] => 2
[1,2,5,7,6,4,3] => 2
[1,2,6,3,4,5,7] => 2
[1,2,6,3,4,7,5] => 2
[1,2,6,3,5,4,7] => 2
[1,2,6,3,5,7,4] => 2
[1,2,6,3,7,4,5] => 2
[1,2,6,3,7,5,4] => 2
[1,2,6,4,3,5,7] => 2
[1,2,6,4,3,7,5] => 2
[1,2,6,4,5,3,7] => 1
[1,2,6,4,5,7,3] => 2
[1,2,6,4,7,3,5] => 1
[1,2,6,4,7,5,3] => 2
[1,2,6,5,3,4,7] => 2
[1,2,6,5,3,7,4] => 2
[1,2,6,5,4,3,7] => 1
[1,2,6,5,4,7,3] => 2
[1,2,6,5,7,3,4] => 2
[1,2,6,5,7,4,3] => 2
[1,2,6,7,3,4,5] => 2
[1,2,6,7,3,5,4] => 2
[1,2,6,7,4,3,5] => 2
[1,2,6,7,4,5,3] => 2
[1,2,6,7,5,3,4] => 1
[1,2,6,7,5,4,3] => 2
[1,2,7,3,4,5,6] => 2
[1,2,7,3,4,6,5] => 2
[1,2,7,3,5,4,6] => 2
[1,2,7,3,5,6,4] => 2
[1,2,7,3,6,4,5] => 2
[1,2,7,3,6,5,4] => 2
[1,2,7,4,3,5,6] => 2
[1,2,7,4,3,6,5] => 2
[1,2,7,4,5,3,6] => 2
[1,2,7,4,5,6,3] => 1
[1,2,7,4,6,3,5] => 2
[1,2,7,4,6,5,3] => 1
[1,2,7,5,3,4,6] => 2
[1,2,7,5,3,6,4] => 2
[1,2,7,5,4,3,6] => 2
[1,2,7,5,4,6,3] => 1
[1,2,7,5,6,3,4] => 2
[1,2,7,5,6,4,3] => 2
[1,2,7,6,3,4,5] => 2
[1,2,7,6,3,5,4] => 2
[1,2,7,6,4,3,5] => 2
[1,2,7,6,4,5,3] => 2
[1,2,7,6,5,3,4] => 2
[1,2,7,6,5,4,3] => 1
[1,3,2,4,5,6,7] => 1
[1,3,2,4,5,7,6] => 1
[1,3,2,4,6,5,7] => 1
[1,3,2,4,6,7,5] => 2
[1,3,2,4,7,5,6] => 2
[1,3,2,4,7,6,5] => 1
[1,3,2,5,4,6,7] => 1
[1,3,2,5,4,7,6] => 1
[1,3,2,5,6,4,7] => 2
[1,3,2,5,6,7,4] => 2
[1,3,2,5,7,4,6] => 2
[1,3,2,5,7,6,4] => 2
[1,3,2,6,4,5,7] => 2
[1,3,2,6,4,7,5] => 2
[1,3,2,6,5,4,7] => 1
[1,3,2,6,5,7,4] => 2
[1,3,2,6,7,4,5] => 1
[1,3,2,6,7,5,4] => 2
[1,3,2,7,4,5,6] => 2
[1,3,2,7,4,6,5] => 2
[1,3,2,7,5,4,6] => 2
[1,3,2,7,5,6,4] => 1
[1,3,2,7,6,4,5] => 2
[1,3,2,7,6,5,4] => 1
[1,3,4,2,5,6,7] => 2
[1,3,4,2,5,7,6] => 2
[1,3,4,2,6,5,7] => 2
[1,3,4,2,6,7,5] => 4
[1,3,4,2,7,5,6] => 4
[1,3,4,2,7,6,5] => 2
[1,3,4,5,2,6,7] => 2
[1,3,4,5,2,7,6] => 2
[1,3,4,5,6,2,7] => 2
[1,3,4,5,6,7,2] => 2
[1,3,4,5,7,2,6] => 2
[1,3,4,5,7,6,2] => 2
[1,3,4,6,2,5,7] => 2
[1,3,4,6,2,7,5] => 2
[1,3,4,6,5,2,7] => 2
[1,3,4,6,5,7,2] => 2
[1,3,4,6,7,2,5] => 2
[1,3,4,6,7,5,2] => 2
[1,3,4,7,2,5,6] => 2
[1,3,4,7,2,6,5] => 2
[1,3,4,7,5,2,6] => 2
[1,3,4,7,5,6,2] => 2
[1,3,4,7,6,2,5] => 2
[1,3,4,7,6,5,2] => 2
[1,3,5,2,4,6,7] => 2
[1,3,5,2,4,7,6] => 2
[1,3,5,2,6,4,7] => 2
[1,3,5,2,6,7,4] => 2
[1,3,5,2,7,4,6] => 2
[1,3,5,2,7,6,4] => 2
[1,3,5,4,2,6,7] => 2
[1,3,5,4,2,7,6] => 2
[1,3,5,4,6,2,7] => 2
[1,3,5,4,6,7,2] => 2
[1,3,5,4,7,2,6] => 2
[1,3,5,4,7,6,2] => 2
[1,3,5,6,2,4,7] => 2
[1,3,5,6,2,7,4] => 4
[1,3,5,6,4,2,7] => 2
[1,3,5,6,4,7,2] => 2
[1,3,5,6,7,2,4] => 2
[1,3,5,6,7,4,2] => 2
[1,3,5,7,2,4,6] => 4
[1,3,5,7,2,6,4] => 2
[1,3,5,7,4,2,6] => 2
[1,3,5,7,4,6,2] => 2
[1,3,5,7,6,2,4] => 2
[1,3,5,7,6,4,2] => 2
[1,3,6,2,4,5,7] => 2
[1,3,6,2,4,7,5] => 2
[1,3,6,2,5,4,7] => 2
[1,3,6,2,5,7,4] => 2
[1,3,6,2,7,4,5] => 2
[1,3,6,2,7,5,4] => 2
[1,3,6,4,2,5,7] => 2
[1,3,6,4,2,7,5] => 2
[1,3,6,4,5,2,7] => 2
[1,3,6,4,5,7,2] => 2
[1,3,6,4,7,2,5] => 2
[1,3,6,4,7,5,2] => 2
[1,3,6,5,2,4,7] => 2
[1,3,6,5,2,7,4] => 2
[1,3,6,5,4,2,7] => 2
[1,3,6,5,4,7,2] => 2
[1,3,6,5,7,2,4] => 4
[1,3,6,5,7,4,2] => 2
[1,3,6,7,2,4,5] => 2
[1,3,6,7,2,5,4] => 2
[1,3,6,7,4,2,5] => 4
[1,3,6,7,4,5,2] => 2
[1,3,6,7,5,2,4] => 2
[1,3,6,7,5,4,2] => 2
[1,3,7,2,4,5,6] => 2
[1,3,7,2,4,6,5] => 2
[1,3,7,2,5,4,6] => 2
[1,3,7,2,5,6,4] => 2
[1,3,7,2,6,4,5] => 2
[1,3,7,2,6,5,4] => 2
[1,3,7,4,2,5,6] => 2
[1,3,7,4,2,6,5] => 2
[1,3,7,4,5,2,6] => 2
[1,3,7,4,5,6,2] => 2
[1,3,7,4,6,2,5] => 2
[1,3,7,4,6,5,2] => 2
[1,3,7,5,2,4,6] => 2
[1,3,7,5,2,6,4] => 2
[1,3,7,5,4,2,6] => 2
[1,3,7,5,4,6,2] => 2
[1,3,7,5,6,2,4] => 2
[1,3,7,5,6,4,2] => 4
[1,3,7,6,2,4,5] => 2
[1,3,7,6,2,5,4] => 2
[1,3,7,6,4,2,5] => 2
[1,3,7,6,4,5,2] => 4
[1,3,7,6,5,2,4] => 2
[1,3,7,6,5,4,2] => 2
[1,4,2,3,5,6,7] => 2
[1,4,2,3,5,7,6] => 2
[1,4,2,3,6,5,7] => 2
[1,4,2,3,6,7,5] => 4
[1,4,2,3,7,5,6] => 4
[1,4,2,3,7,6,5] => 2
[1,4,2,5,3,6,7] => 2
[1,4,2,5,3,7,6] => 2
[1,4,2,5,6,3,7] => 2
[1,4,2,5,6,7,3] => 2
[1,4,2,5,7,3,6] => 2
[1,4,2,5,7,6,3] => 2
[1,4,2,6,3,5,7] => 2
[1,4,2,6,3,7,5] => 2
[1,4,2,6,5,3,7] => 2
[1,4,2,6,5,7,3] => 2
[1,4,2,6,7,3,5] => 2
[1,4,2,6,7,5,3] => 2
[1,4,2,7,3,5,6] => 2
[1,4,2,7,3,6,5] => 2
[1,4,2,7,5,3,6] => 2
[1,4,2,7,5,6,3] => 2
[1,4,2,7,6,3,5] => 2
[1,4,2,7,6,5,3] => 2
[1,4,3,2,5,6,7] => 1
[1,4,3,2,5,7,6] => 1
[1,4,3,2,6,5,7] => 1
[1,4,3,2,6,7,5] => 2
[1,4,3,2,7,5,6] => 2
[1,4,3,2,7,6,5] => 1
[1,4,3,5,2,6,7] => 2
[1,4,3,5,2,7,6] => 2
[1,4,3,5,6,2,7] => 2
[1,4,3,5,6,7,2] => 2
[1,4,3,5,7,2,6] => 2
[1,4,3,5,7,6,2] => 2
[1,4,3,6,2,5,7] => 2
[1,4,3,6,2,7,5] => 2
[1,4,3,6,5,2,7] => 2
[1,4,3,6,5,7,2] => 2
[1,4,3,6,7,2,5] => 2
[1,4,3,6,7,5,2] => 2
[1,4,3,7,2,5,6] => 2
[1,4,3,7,2,6,5] => 2
[1,4,3,7,5,2,6] => 2
[1,4,3,7,5,6,2] => 2
[1,4,3,7,6,2,5] => 2
[1,4,3,7,6,5,2] => 2
[1,4,5,2,3,6,7] => 1
[1,4,5,2,3,7,6] => 1
[1,4,5,2,6,3,7] => 2
[1,4,5,2,6,7,3] => 2
[1,4,5,2,7,3,6] => 2
[1,4,5,2,7,6,3] => 2
[1,4,5,3,2,6,7] => 2
[1,4,5,3,2,7,6] => 2
[1,4,5,3,6,2,7] => 2
[1,4,5,3,6,7,2] => 2
[1,4,5,3,7,2,6] => 2
[1,4,5,3,7,6,2] => 2
[1,4,5,6,2,3,7] => 2
[1,4,5,6,2,7,3] => 2
[1,4,5,6,3,2,7] => 2
[1,4,5,6,3,7,2] => 2
[1,4,5,6,7,2,3] => 4
[1,4,5,6,7,3,2] => 2
[1,4,5,7,2,3,6] => 2
[1,4,5,7,2,6,3] => 2
[1,4,5,7,3,2,6] => 2
[1,4,5,7,3,6,2] => 2
[1,4,5,7,6,2,3] => 2
[1,4,5,7,6,3,2] => 4
[1,4,6,2,3,5,7] => 2
[1,4,6,2,3,7,5] => 2
[1,4,6,2,5,3,7] => 1
[1,4,6,2,5,7,3] => 2
[1,4,6,2,7,3,5] => 1
[1,4,6,2,7,5,3] => 2
[1,4,6,3,2,5,7] => 2
[1,4,6,3,2,7,5] => 2
[1,4,6,3,5,2,7] => 2
[1,4,6,3,5,7,2] => 2
[1,4,6,3,7,2,5] => 2
[1,4,6,3,7,5,2] => 2
[1,4,6,5,2,3,7] => 2
[1,4,6,5,2,7,3] => 4
[1,4,6,5,3,2,7] => 2
click to show generating function       
Description
The number of permutations in the equivalence class of a permutation obtained by taking inverses of cycles.
In other words, this is $2^k$ where $k$ is the number of cycles of length at least three (St000486The number of cycles of length at least 3 of a permutation.) in its cycle decomposition.
The generating function for the number of equivalence classes, $f(n)$, is
$$\sum_{n\geq 0} f(n)\frac{x^n}{n!} = \frac{e(\frac{x}{2} + \frac{x^2}{4})}{\sqrt{1-x}}.$$
References
[1] Zwick, D. Equivalence class of permutations based on cycle decomposition and their inverses MathOverflow:324510
[2] Example 5.2.9. and Exercise 5.18. Stanley, R. P. Enumerative combinatorics. Vol. 2 MathSciNet:1676282
Code
def statistic(sigma):
    return 2^sum(1 for c in sigma.cycle_tuples() if len(c) > 2)

Created
Mar 03, 2019 at 17:09 by Christian Stump
Updated
Mar 03, 2019 at 17:09 by Christian Stump