Identifier
Identifier
  • St000542: Permutations ⟶ ℤ (values match St000541The number of indices greater than or equal to 2 of a permutation such that all smaller indices appear to its right.)
Values
[1] => 1
[1,2] => 1
[2,1] => 2
[1,2,3] => 1
[1,3,2] => 1
[2,1,3] => 2
[2,3,1] => 2
[3,1,2] => 2
[3,2,1] => 3
[1,2,3,4] => 1
[1,2,4,3] => 1
[1,3,2,4] => 1
[1,3,4,2] => 1
[1,4,2,3] => 1
[1,4,3,2] => 1
[2,1,3,4] => 2
[2,1,4,3] => 2
[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] => 3
[3,2,4,1] => 3
[3,4,1,2] => 2
[3,4,2,1] => 3
[4,1,2,3] => 2
[4,1,3,2] => 2
[4,2,1,3] => 3
[4,2,3,1] => 3
[4,3,1,2] => 3
[4,3,2,1] => 4
[1,2,3,4,5] => 1
[1,2,3,5,4] => 1
[1,2,4,3,5] => 1
[1,2,4,5,3] => 1
[1,2,5,3,4] => 1
[1,2,5,4,3] => 1
[1,3,2,4,5] => 1
[1,3,2,5,4] => 1
[1,3,4,2,5] => 1
[1,3,4,5,2] => 1
[1,3,5,2,4] => 1
[1,3,5,4,2] => 1
[1,4,2,3,5] => 1
[1,4,2,5,3] => 1
[1,4,3,2,5] => 1
[1,4,3,5,2] => 1
[1,4,5,2,3] => 1
[1,4,5,3,2] => 1
[1,5,2,3,4] => 1
[1,5,2,4,3] => 1
[1,5,3,2,4] => 1
[1,5,3,4,2] => 1
[1,5,4,2,3] => 1
[1,5,4,3,2] => 1
[2,1,3,4,5] => 2
[2,1,3,5,4] => 2
[2,1,4,3,5] => 2
[2,1,4,5,3] => 2
[2,1,5,3,4] => 2
[2,1,5,4,3] => 2
[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] => 3
[3,2,1,5,4] => 3
[3,2,4,1,5] => 3
[3,2,4,5,1] => 3
[3,2,5,1,4] => 3
[3,2,5,4,1] => 3
[3,4,1,2,5] => 2
[3,4,1,5,2] => 2
[3,4,2,1,5] => 3
[3,4,2,5,1] => 3
[3,4,5,1,2] => 2
[3,4,5,2,1] => 3
[3,5,1,2,4] => 2
[3,5,1,4,2] => 2
[3,5,2,1,4] => 3
[3,5,2,4,1] => 3
[3,5,4,1,2] => 2
[3,5,4,2,1] => 3
[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] => 3
[4,2,1,5,3] => 3
[4,2,3,1,5] => 3
[4,2,3,5,1] => 3
[4,2,5,1,3] => 3
[4,2,5,3,1] => 3
[4,3,1,2,5] => 3
[4,3,1,5,2] => 3
[4,3,2,1,5] => 4
[4,3,2,5,1] => 4
[4,3,5,1,2] => 3
[4,3,5,2,1] => 4
[4,5,1,2,3] => 2
[4,5,1,3,2] => 2
[4,5,2,1,3] => 3
[4,5,2,3,1] => 3
[4,5,3,1,2] => 3
[4,5,3,2,1] => 4
[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] => 3
[5,2,1,4,3] => 3
[5,2,3,1,4] => 3
[5,2,3,4,1] => 3
[5,2,4,1,3] => 3
[5,2,4,3,1] => 3
[5,3,1,2,4] => 3
[5,3,1,4,2] => 3
[5,3,2,1,4] => 4
[5,3,2,4,1] => 4
[5,3,4,1,2] => 3
[5,3,4,2,1] => 4
[5,4,1,2,3] => 3
[5,4,1,3,2] => 3
[5,4,2,1,3] => 4
[5,4,2,3,1] => 4
[5,4,3,1,2] => 4
[5,4,3,2,1] => 5
[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] => 1
[1,2,3,6,4,5] => 1
[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] => 1
[1,2,4,5,6,3] => 1
[1,2,4,6,3,5] => 1
[1,2,4,6,5,3] => 1
[1,2,5,3,4,6] => 1
[1,2,5,3,6,4] => 1
[1,2,5,4,3,6] => 1
[1,2,5,4,6,3] => 1
[1,2,5,6,3,4] => 1
[1,2,5,6,4,3] => 1
[1,2,6,3,4,5] => 1
[1,2,6,3,5,4] => 1
[1,2,6,4,3,5] => 1
[1,2,6,4,5,3] => 1
[1,2,6,5,3,4] => 1
[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] => 1
[1,3,2,6,4,5] => 1
[1,3,2,6,5,4] => 1
[1,3,4,2,5,6] => 1
[1,3,4,2,6,5] => 1
[1,3,4,5,2,6] => 1
[1,3,4,5,6,2] => 1
[1,3,4,6,2,5] => 1
[1,3,4,6,5,2] => 1
[1,3,5,2,4,6] => 1
[1,3,5,2,6,4] => 1
[1,3,5,4,2,6] => 1
[1,3,5,4,6,2] => 1
[1,3,5,6,2,4] => 1
[1,3,5,6,4,2] => 1
[1,3,6,2,4,5] => 1
[1,3,6,2,5,4] => 1
[1,3,6,4,2,5] => 1
[1,3,6,4,5,2] => 1
[1,3,6,5,2,4] => 1
[1,3,6,5,4,2] => 1
[1,4,2,3,5,6] => 1
[1,4,2,3,6,5] => 1
[1,4,2,5,3,6] => 1
[1,4,2,5,6,3] => 1
[1,4,2,6,3,5] => 1
[1,4,2,6,5,3] => 1
[1,4,3,2,5,6] => 1
[1,4,3,2,6,5] => 1
[1,4,3,5,2,6] => 1
[1,4,3,5,6,2] => 1
[1,4,3,6,2,5] => 1
[1,4,3,6,5,2] => 1
[1,4,5,2,3,6] => 1
[1,4,5,2,6,3] => 1
[1,4,5,3,2,6] => 1
[1,4,5,3,6,2] => 1
[1,4,5,6,2,3] => 1
[1,4,5,6,3,2] => 1
[1,4,6,2,3,5] => 1
[1,4,6,2,5,3] => 1
[1,4,6,3,2,5] => 1
[1,4,6,3,5,2] => 1
[1,4,6,5,2,3] => 1
[1,4,6,5,3,2] => 1
[1,5,2,3,4,6] => 1
[1,5,2,3,6,4] => 1
[1,5,2,4,3,6] => 1
[1,5,2,4,6,3] => 1
[1,5,2,6,3,4] => 1
[1,5,2,6,4,3] => 1
[1,5,3,2,4,6] => 1
[1,5,3,2,6,4] => 1
[1,5,3,4,2,6] => 1
[1,5,3,4,6,2] => 1
[1,5,3,6,2,4] => 1
[1,5,3,6,4,2] => 1
[1,5,4,2,3,6] => 1
[1,5,4,2,6,3] => 1
[1,5,4,3,2,6] => 1
[1,5,4,3,6,2] => 1
[1,5,4,6,2,3] => 1
[1,5,4,6,3,2] => 1
[1,5,6,2,3,4] => 1
[1,5,6,2,4,3] => 1
[1,5,6,3,2,4] => 1
[1,5,6,3,4,2] => 1
[1,5,6,4,2,3] => 1
[1,5,6,4,3,2] => 1
[1,6,2,3,4,5] => 1
[1,6,2,3,5,4] => 1
[1,6,2,4,3,5] => 1
[1,6,2,4,5,3] => 1
[1,6,2,5,3,4] => 1
[1,6,2,5,4,3] => 1
[1,6,3,2,4,5] => 1
[1,6,3,2,5,4] => 1
[1,6,3,4,2,5] => 1
[1,6,3,4,5,2] => 1
[1,6,3,5,2,4] => 1
[1,6,3,5,4,2] => 1
[1,6,4,2,3,5] => 1
[1,6,4,2,5,3] => 1
[1,6,4,3,2,5] => 1
[1,6,4,3,5,2] => 1
[1,6,4,5,2,3] => 1
[1,6,4,5,3,2] => 1
[1,6,5,2,3,4] => 1
[1,6,5,2,4,3] => 1
[1,6,5,3,2,4] => 1
[1,6,5,3,4,2] => 1
[1,6,5,4,2,3] => 1
[1,6,5,4,3,2] => 1
[2,1,3,4,5,6] => 2
[2,1,3,4,6,5] => 2
[2,1,3,5,4,6] => 2
[2,1,3,5,6,4] => 2
[2,1,3,6,4,5] => 2
[2,1,3,6,5,4] => 2
[2,1,4,3,5,6] => 2
[2,1,4,3,6,5] => 2
[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] => 2
[2,1,5,4,6,3] => 2
[2,1,5,6,3,4] => 2
[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] => 2
[2,1,6,5,3,4] => 2
[2,1,6,5,4,3] => 2
[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] => 2
[2,3,1,6,4,5] => 2
[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] => 2
[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] => 2
[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] => 2
[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] => 2
[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] => 2
[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] => 2
[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] => 2
[3,1,2,6,4,5] => 2
[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] => 3
[3,2,1,4,6,5] => 3
[3,2,1,5,4,6] => 3
[3,2,1,5,6,4] => 3
[3,2,1,6,4,5] => 3
[3,2,1,6,5,4] => 3
[3,2,4,1,5,6] => 3
[3,2,4,1,6,5] => 3
[3,2,4,5,1,6] => 3
[3,2,4,5,6,1] => 3
[3,2,4,6,1,5] => 3
[3,2,4,6,5,1] => 3
[3,2,5,1,4,6] => 3
[3,2,5,1,6,4] => 3
[3,2,5,4,1,6] => 3
[3,2,5,4,6,1] => 3
[3,2,5,6,1,4] => 3
[3,2,5,6,4,1] => 3
[3,2,6,1,4,5] => 3
[3,2,6,1,5,4] => 3
[3,2,6,4,1,5] => 3
[3,2,6,4,5,1] => 3
[3,2,6,5,1,4] => 3
[3,2,6,5,4,1] => 3
[3,4,1,2,5,6] => 2
[3,4,1,2,6,5] => 2
[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] => 3
[3,4,2,1,6,5] => 3
[3,4,2,5,1,6] => 3
[3,4,2,5,6,1] => 3
[3,4,2,6,1,5] => 3
[3,4,2,6,5,1] => 3
[3,4,5,1,2,6] => 2
[3,4,5,1,6,2] => 2
[3,4,5,2,1,6] => 3
[3,4,5,2,6,1] => 3
[3,4,5,6,1,2] => 2
[3,4,5,6,2,1] => 3
[3,4,6,1,2,5] => 2
[3,4,6,1,5,2] => 2
[3,4,6,2,1,5] => 3
[3,4,6,2,5,1] => 3
[3,4,6,5,1,2] => 2
[3,4,6,5,2,1] => 3
[3,5,1,2,4,6] => 2
[3,5,1,2,6,4] => 2
[3,5,1,4,2,6] => 2
[3,5,1,4,6,2] => 2
[3,5,1,6,2,4] => 2
[3,5,1,6,4,2] => 2
[3,5,2,1,4,6] => 3
[3,5,2,1,6,4] => 3
[3,5,2,4,1,6] => 3
[3,5,2,4,6,1] => 3
[3,5,2,6,1,4] => 3
[3,5,2,6,4,1] => 3
[3,5,4,1,2,6] => 2
[3,5,4,1,6,2] => 2
[3,5,4,2,1,6] => 3
[3,5,4,2,6,1] => 3
[3,5,4,6,1,2] => 2
[3,5,4,6,2,1] => 3
[3,5,6,1,2,4] => 2
[3,5,6,1,4,2] => 2
[3,5,6,2,1,4] => 3
[3,5,6,2,4,1] => 3
[3,5,6,4,1,2] => 2
[3,5,6,4,2,1] => 3
[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] => 2
[3,6,1,5,2,4] => 2
[3,6,1,5,4,2] => 2
[3,6,2,1,4,5] => 3
[3,6,2,1,5,4] => 3
[3,6,2,4,1,5] => 3
[3,6,2,4,5,1] => 3
[3,6,2,5,1,4] => 3
[3,6,2,5,4,1] => 3
[3,6,4,1,2,5] => 2
[3,6,4,1,5,2] => 2
[3,6,4,2,1,5] => 3
[3,6,4,2,5,1] => 3
[3,6,4,5,1,2] => 2
[3,6,4,5,2,1] => 3
[3,6,5,1,2,4] => 2
[3,6,5,1,4,2] => 2
[3,6,5,2,1,4] => 3
[3,6,5,2,4,1] => 3
[3,6,5,4,1,2] => 2
[3,6,5,4,2,1] => 3
[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] => 2
[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] => 2
[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] => 3
[4,2,1,3,6,5] => 3
[4,2,1,5,3,6] => 3
[4,2,1,5,6,3] => 3
[4,2,1,6,3,5] => 3
[4,2,1,6,5,3] => 3
[4,2,3,1,5,6] => 3
[4,2,3,1,6,5] => 3
[4,2,3,5,1,6] => 3
[4,2,3,5,6,1] => 3
[4,2,3,6,1,5] => 3
[4,2,3,6,5,1] => 3
[4,2,5,1,3,6] => 3
[4,2,5,1,6,3] => 3
[4,2,5,3,1,6] => 3
[4,2,5,3,6,1] => 3
[4,2,5,6,1,3] => 3
[4,2,5,6,3,1] => 3
[4,2,6,1,3,5] => 3
[4,2,6,1,5,3] => 3
[4,2,6,3,1,5] => 3
[4,2,6,3,5,1] => 3
[4,2,6,5,1,3] => 3
[4,2,6,5,3,1] => 3
[4,3,1,2,5,6] => 3
[4,3,1,2,6,5] => 3
[4,3,1,5,2,6] => 3
[4,3,1,5,6,2] => 3
[4,3,1,6,2,5] => 3
[4,3,1,6,5,2] => 3
[4,3,2,1,5,6] => 4
[4,3,2,1,6,5] => 4
[4,3,2,5,1,6] => 4
[4,3,2,5,6,1] => 4
[4,3,2,6,1,5] => 4
[4,3,2,6,5,1] => 4
[4,3,5,1,2,6] => 3
[4,3,5,1,6,2] => 3
[4,3,5,2,1,6] => 4
[4,3,5,2,6,1] => 4
[4,3,5,6,1,2] => 3
[4,3,5,6,2,1] => 4
[4,3,6,1,2,5] => 3
[4,3,6,1,5,2] => 3
[4,3,6,2,1,5] => 4
[4,3,6,2,5,1] => 4
[4,3,6,5,1,2] => 3
[4,3,6,5,2,1] => 4
[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] => 2
[4,5,1,6,2,3] => 2
[4,5,1,6,3,2] => 2
[4,5,2,1,3,6] => 3
[4,5,2,1,6,3] => 3
[4,5,2,3,1,6] => 3
[4,5,2,3,6,1] => 3
[4,5,2,6,1,3] => 3
[4,5,2,6,3,1] => 3
[4,5,3,1,2,6] => 3
[4,5,3,1,6,2] => 3
[4,5,3,2,1,6] => 4
[4,5,3,2,6,1] => 4
[4,5,3,6,1,2] => 3
[4,5,3,6,2,1] => 4
[4,5,6,1,2,3] => 2
[4,5,6,1,3,2] => 2
[4,5,6,2,1,3] => 3
[4,5,6,2,3,1] => 3
[4,5,6,3,1,2] => 3
[4,5,6,3,2,1] => 4
[4,6,1,2,3,5] => 2
[4,6,1,2,5,3] => 2
[4,6,1,3,2,5] => 2
[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] => 3
[4,6,2,1,5,3] => 3
[4,6,2,3,1,5] => 3
[4,6,2,3,5,1] => 3
[4,6,2,5,1,3] => 3
[4,6,2,5,3,1] => 3
[4,6,3,1,2,5] => 3
[4,6,3,1,5,2] => 3
[4,6,3,2,1,5] => 4
[4,6,3,2,5,1] => 4
[4,6,3,5,1,2] => 3
[4,6,3,5,2,1] => 4
[4,6,5,1,2,3] => 2
[4,6,5,1,3,2] => 2
[4,6,5,2,1,3] => 3
[4,6,5,2,3,1] => 3
[4,6,5,3,1,2] => 3
[4,6,5,3,2,1] => 4
[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] => 2
[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] => 2
[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] => 3
[5,2,1,3,6,4] => 3
[5,2,1,4,3,6] => 3
[5,2,1,4,6,3] => 3
[5,2,1,6,3,4] => 3
[5,2,1,6,4,3] => 3
[5,2,3,1,4,6] => 3
[5,2,3,1,6,4] => 3
[5,2,3,4,1,6] => 3
[5,2,3,4,6,1] => 3
[5,2,3,6,1,4] => 3
[5,2,3,6,4,1] => 3
[5,2,4,1,3,6] => 3
[5,2,4,1,6,3] => 3
[5,2,4,3,1,6] => 3
[5,2,4,3,6,1] => 3
[5,2,4,6,1,3] => 3
[5,2,4,6,3,1] => 3
[5,2,6,1,3,4] => 3
[5,2,6,1,4,3] => 3
[5,2,6,3,1,4] => 3
[5,2,6,3,4,1] => 3
[5,2,6,4,1,3] => 3
[5,2,6,4,3,1] => 3
[5,3,1,2,4,6] => 3
[5,3,1,2,6,4] => 3
[5,3,1,4,2,6] => 3
[5,3,1,4,6,2] => 3
[5,3,1,6,2,4] => 3
[5,3,1,6,4,2] => 3
[5,3,2,1,4,6] => 4
[5,3,2,1,6,4] => 4
[5,3,2,4,1,6] => 4
[5,3,2,4,6,1] => 4
[5,3,2,6,1,4] => 4
[5,3,2,6,4,1] => 4
[5,3,4,1,2,6] => 3
[5,3,4,1,6,2] => 3
[5,3,4,2,1,6] => 4
[5,3,4,2,6,1] => 4
[5,3,4,6,1,2] => 3
[5,3,4,6,2,1] => 4
[5,3,6,1,2,4] => 3
[5,3,6,1,4,2] => 3
[5,3,6,2,1,4] => 4
[5,3,6,2,4,1] => 4
[5,3,6,4,1,2] => 3
[5,3,6,4,2,1] => 4
[5,4,1,2,3,6] => 3
[5,4,1,2,6,3] => 3
[5,4,1,3,2,6] => 3
[5,4,1,3,6,2] => 3
[5,4,1,6,2,3] => 3
[5,4,1,6,3,2] => 3
[5,4,2,1,3,6] => 4
[5,4,2,1,6,3] => 4
[5,4,2,3,1,6] => 4
[5,4,2,3,6,1] => 4
[5,4,2,6,1,3] => 4
[5,4,2,6,3,1] => 4
[5,4,3,1,2,6] => 4
[5,4,3,1,6,2] => 4
[5,4,3,2,1,6] => 5
[5,4,3,2,6,1] => 5
[5,4,3,6,1,2] => 4
[5,4,3,6,2,1] => 5
[5,4,6,1,2,3] => 3
[5,4,6,1,3,2] => 3
[5,4,6,2,1,3] => 4
[5,4,6,2,3,1] => 4
[5,4,6,3,1,2] => 4
[5,4,6,3,2,1] => 5
[5,6,1,2,3,4] => 2
[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] => 3
[5,6,2,1,4,3] => 3
[5,6,2,3,1,4] => 3
[5,6,2,3,4,1] => 3
[5,6,2,4,1,3] => 3
[5,6,2,4,3,1] => 3
[5,6,3,1,2,4] => 3
[5,6,3,1,4,2] => 3
[5,6,3,2,1,4] => 4
[5,6,3,2,4,1] => 4
[5,6,3,4,1,2] => 3
[5,6,3,4,2,1] => 4
[5,6,4,1,2,3] => 3
[5,6,4,1,3,2] => 3
[5,6,4,2,1,3] => 4
[5,6,4,2,3,1] => 4
[5,6,4,3,1,2] => 4
[5,6,4,3,2,1] => 5
[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] => 2
[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] => 2
[6,1,5,4,2,3] => 2
[6,1,5,4,3,2] => 2
[6,2,1,3,4,5] => 3
[6,2,1,3,5,4] => 3
[6,2,1,4,3,5] => 3
[6,2,1,4,5,3] => 3
[6,2,1,5,3,4] => 3
[6,2,1,5,4,3] => 3
[6,2,3,1,4,5] => 3
[6,2,3,1,5,4] => 3
[6,2,3,4,1,5] => 3
[6,2,3,4,5,1] => 3
[6,2,3,5,1,4] => 3
[6,2,3,5,4,1] => 3
[6,2,4,1,3,5] => 3
[6,2,4,1,5,3] => 3
[6,2,4,3,1,5] => 3
[6,2,4,3,5,1] => 3
[6,2,4,5,1,3] => 3
[6,2,4,5,3,1] => 3
[6,2,5,1,3,4] => 3
[6,2,5,1,4,3] => 3
[6,2,5,3,1,4] => 3
[6,2,5,3,4,1] => 3
[6,2,5,4,1,3] => 3
[6,2,5,4,3,1] => 3
[6,3,1,2,4,5] => 3
[6,3,1,2,5,4] => 3
[6,3,1,4,2,5] => 3
[6,3,1,4,5,2] => 3
[6,3,1,5,2,4] => 3
[6,3,1,5,4,2] => 3
[6,3,2,1,4,5] => 4
[6,3,2,1,5,4] => 4
[6,3,2,4,1,5] => 4
[6,3,2,4,5,1] => 4
[6,3,2,5,1,4] => 4
[6,3,2,5,4,1] => 4
[6,3,4,1,2,5] => 3
[6,3,4,1,5,2] => 3
[6,3,4,2,1,5] => 4
[6,3,4,2,5,1] => 4
[6,3,4,5,1,2] => 3
[6,3,4,5,2,1] => 4
[6,3,5,1,2,4] => 3
[6,3,5,1,4,2] => 3
[6,3,5,2,1,4] => 4
[6,3,5,2,4,1] => 4
[6,3,5,4,1,2] => 3
[6,3,5,4,2,1] => 4
[6,4,1,2,3,5] => 3
[6,4,1,2,5,3] => 3
[6,4,1,3,2,5] => 3
[6,4,1,3,5,2] => 3
[6,4,1,5,2,3] => 3
[6,4,1,5,3,2] => 3
[6,4,2,1,3,5] => 4
[6,4,2,1,5,3] => 4
[6,4,2,3,1,5] => 4
[6,4,2,3,5,1] => 4
[6,4,2,5,1,3] => 4
[6,4,2,5,3,1] => 4
[6,4,3,1,2,5] => 4
[6,4,3,1,5,2] => 4
[6,4,3,2,1,5] => 5
[6,4,3,2,5,1] => 5
[6,4,3,5,1,2] => 4
[6,4,3,5,2,1] => 5
[6,4,5,1,2,3] => 3
[6,4,5,1,3,2] => 3
[6,4,5,2,1,3] => 4
[6,4,5,2,3,1] => 4
[6,4,5,3,1,2] => 4
[6,4,5,3,2,1] => 5
[6,5,1,2,3,4] => 3
[6,5,1,2,4,3] => 3
[6,5,1,3,2,4] => 3
[6,5,1,3,4,2] => 3
[6,5,1,4,2,3] => 3
[6,5,1,4,3,2] => 3
[6,5,2,1,3,4] => 4
[6,5,2,1,4,3] => 4
[6,5,2,3,1,4] => 4
[6,5,2,3,4,1] => 4
[6,5,2,4,1,3] => 4
[6,5,2,4,3,1] => 4
[6,5,3,1,2,4] => 4
[6,5,3,1,4,2] => 4
[6,5,3,2,1,4] => 5
[6,5,3,2,4,1] => 5
[6,5,3,4,1,2] => 4
[6,5,3,4,2,1] => 5
[6,5,4,1,2,3] => 4
[6,5,4,1,3,2] => 4
[6,5,4,2,1,3] => 5
[6,5,4,2,3,1] => 5
[6,5,4,3,1,2] => 5
[6,5,4,3,2,1] => 6
[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] => 1
[1,2,3,4,7,5,6] => 1
[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] => 1
[1,2,3,5,6,7,4] => 1
[1,2,3,5,7,4,6] => 1
[1,2,3,5,7,6,4] => 1
[1,2,3,6,4,5,7] => 1
[1,2,3,6,4,7,5] => 1
[1,2,3,6,5,4,7] => 1
[1,2,3,6,5,7,4] => 1
[1,2,3,6,7,4,5] => 1
[1,2,3,6,7,5,4] => 1
[1,2,3,7,4,5,6] => 1
[1,2,3,7,4,6,5] => 1
[1,2,3,7,5,4,6] => 1
[1,2,3,7,5,6,4] => 1
[1,2,3,7,6,4,5] => 1
[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] => 1
[1,2,4,3,7,5,6] => 1
[1,2,4,3,7,6,5] => 1
[1,2,4,5,3,6,7] => 1
[1,2,4,5,3,7,6] => 1
[1,2,4,5,6,3,7] => 1
[1,2,4,5,6,7,3] => 1
[1,2,4,5,7,3,6] => 1
[1,2,4,5,7,6,3] => 1
[1,2,4,6,3,5,7] => 1
[1,2,4,6,3,7,5] => 1
[1,2,4,6,5,3,7] => 1
[1,2,4,6,5,7,3] => 1
[1,2,4,6,7,3,5] => 1
[1,2,4,6,7,5,3] => 1
[1,2,4,7,3,5,6] => 1
[1,2,4,7,3,6,5] => 1
[1,2,4,7,5,3,6] => 1
[1,2,4,7,5,6,3] => 1
[1,2,4,7,6,3,5] => 1
[1,2,4,7,6,5,3] => 1
[1,2,5,3,4,6,7] => 1
[1,2,5,3,4,7,6] => 1
[1,2,5,3,6,4,7] => 1
[1,2,5,3,6,7,4] => 1
[1,2,5,3,7,4,6] => 1
[1,2,5,3,7,6,4] => 1
[1,2,5,4,3,6,7] => 1
[1,2,5,4,3,7,6] => 1
[1,2,5,4,6,3,7] => 1
[1,2,5,4,6,7,3] => 1
[1,2,5,4,7,3,6] => 1
[1,2,5,4,7,6,3] => 1
[1,2,5,6,3,4,7] => 1
[1,2,5,6,3,7,4] => 1
[1,2,5,6,4,3,7] => 1
[1,2,5,6,4,7,3] => 1
[1,2,5,6,7,3,4] => 1
[1,2,5,6,7,4,3] => 1
[1,2,5,7,3,4,6] => 1
[1,2,5,7,3,6,4] => 1
[1,2,5,7,4,3,6] => 1
[1,2,5,7,4,6,3] => 1
[1,2,5,7,6,3,4] => 1
[1,2,5,7,6,4,3] => 1
[1,2,6,3,4,5,7] => 1
[1,2,6,3,4,7,5] => 1
[1,2,6,3,5,4,7] => 1
[1,2,6,3,5,7,4] => 1
[1,2,6,3,7,4,5] => 1
[1,2,6,3,7,5,4] => 1
[1,2,6,4,3,5,7] => 1
[1,2,6,4,3,7,5] => 1
[1,2,6,4,5,3,7] => 1
[1,2,6,4,5,7,3] => 1
[1,2,6,4,7,3,5] => 1
[1,2,6,4,7,5,3] => 1
[1,2,6,5,3,4,7] => 1
[1,2,6,5,3,7,4] => 1
[1,2,6,5,4,3,7] => 1
[1,2,6,5,4,7,3] => 1
[1,2,6,5,7,3,4] => 1
[1,2,6,5,7,4,3] => 1
[1,2,6,7,3,4,5] => 1
[1,2,6,7,3,5,4] => 1
[1,2,6,7,4,3,5] => 1
[1,2,6,7,4,5,3] => 1
[1,2,6,7,5,3,4] => 1
[1,2,6,7,5,4,3] => 1
[1,2,7,3,4,5,6] => 1
[1,2,7,3,4,6,5] => 1
[1,2,7,3,5,4,6] => 1
[1,2,7,3,5,6,4] => 1
[1,2,7,3,6,4,5] => 1
[1,2,7,3,6,5,4] => 1
[1,2,7,4,3,5,6] => 1
[1,2,7,4,3,6,5] => 1
[1,2,7,4,5,3,6] => 1
[1,2,7,4,5,6,3] => 1
[1,2,7,4,6,3,5] => 1
[1,2,7,4,6,5,3] => 1
[1,2,7,5,3,4,6] => 1
[1,2,7,5,3,6,4] => 1
[1,2,7,5,4,3,6] => 1
[1,2,7,5,4,6,3] => 1
[1,2,7,5,6,3,4] => 1
[1,2,7,5,6,4,3] => 1
[1,2,7,6,3,4,5] => 1
[1,2,7,6,3,5,4] => 1
[1,2,7,6,4,3,5] => 1
[1,2,7,6,4,5,3] => 1
[1,2,7,6,5,3,4] => 1
[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] => 1
[1,3,2,4,7,5,6] => 1
[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] => 1
[1,3,2,5,6,7,4] => 1
[1,3,2,5,7,4,6] => 1
[1,3,2,5,7,6,4] => 1
[1,3,2,6,4,5,7] => 1
[1,3,2,6,4,7,5] => 1
[1,3,2,6,5,4,7] => 1
[1,3,2,6,5,7,4] => 1
[1,3,2,6,7,4,5] => 1
[1,3,2,6,7,5,4] => 1
[1,3,2,7,4,5,6] => 1
[1,3,2,7,4,6,5] => 1
[1,3,2,7,5,4,6] => 1
[1,3,2,7,5,6,4] => 1
[1,3,2,7,6,4,5] => 1
[1,3,2,7,6,5,4] => 1
[1,3,4,2,5,6,7] => 1
[1,3,4,2,5,7,6] => 1
[1,3,4,2,6,5,7] => 1
[1,3,4,2,6,7,5] => 1
[1,3,4,2,7,5,6] => 1
[1,3,4,2,7,6,5] => 1
[1,3,4,5,2,6,7] => 1
[1,3,4,5,2,7,6] => 1
[1,3,4,5,6,2,7] => 1
[1,3,4,5,6,7,2] => 1
[1,3,4,5,7,2,6] => 1
[1,3,4,5,7,6,2] => 1
[1,3,4,6,2,5,7] => 1
[1,3,4,6,2,7,5] => 1
[1,3,4,6,5,2,7] => 1
[1,3,4,6,5,7,2] => 1
[1,3,4,6,7,2,5] => 1
[1,3,4,6,7,5,2] => 1
[1,3,4,7,2,5,6] => 1
[1,3,4,7,2,6,5] => 1
[1,3,4,7,5,2,6] => 1
[1,3,4,7,5,6,2] => 1
[1,3,4,7,6,2,5] => 1
[1,3,4,7,6,5,2] => 1
[1,3,5,2,4,6,7] => 1
[1,3,5,2,4,7,6] => 1
[1,3,5,2,6,4,7] => 1
[1,3,5,2,6,7,4] => 1
[1,3,5,2,7,4,6] => 1
[1,3,5,2,7,6,4] => 1
[1,3,5,4,2,6,7] => 1
[1,3,5,4,2,7,6] => 1
[1,3,5,4,6,2,7] => 1
[1,3,5,4,6,7,2] => 1
[1,3,5,4,7,2,6] => 1
[1,3,5,4,7,6,2] => 1
[1,3,5,6,2,4,7] => 1
[1,3,5,6,2,7,4] => 1
[1,3,5,6,4,2,7] => 1
[1,3,5,6,4,7,2] => 1
[1,3,5,6,7,2,4] => 1
[1,3,5,6,7,4,2] => 1
[1,3,5,7,2,4,6] => 1
[1,3,5,7,2,6,4] => 1
[1,3,5,7,4,2,6] => 1
[1,3,5,7,4,6,2] => 1
[1,3,5,7,6,2,4] => 1
[1,3,5,7,6,4,2] => 1
[1,3,6,2,4,5,7] => 1
[1,3,6,2,4,7,5] => 1
[1,3,6,2,5,4,7] => 1
[1,3,6,2,5,7,4] => 1
[1,3,6,2,7,4,5] => 1
[1,3,6,2,7,5,4] => 1
[1,3,6,4,2,5,7] => 1
[1,3,6,4,2,7,5] => 1
[1,3,6,4,5,2,7] => 1
[1,3,6,4,5,7,2] => 1
[1,3,6,4,7,2,5] => 1
[1,3,6,4,7,5,2] => 1
[1,3,6,5,2,4,7] => 1
[1,3,6,5,2,7,4] => 1
[1,3,6,5,4,2,7] => 1
[1,3,6,5,4,7,2] => 1
[1,3,6,5,7,2,4] => 1
[1,3,6,5,7,4,2] => 1
[1,3,6,7,2,4,5] => 1
[1,3,6,7,2,5,4] => 1
[1,3,6,7,4,2,5] => 1
[1,3,6,7,4,5,2] => 1
[1,3,6,7,5,2,4] => 1
[1,3,6,7,5,4,2] => 1
[1,3,7,2,4,5,6] => 1
[1,3,7,2,4,6,5] => 1
[1,3,7,2,5,4,6] => 1
[1,3,7,2,5,6,4] => 1
[1,3,7,2,6,4,5] => 1
[1,3,7,2,6,5,4] => 1
[1,3,7,4,2,5,6] => 1
[1,3,7,4,2,6,5] => 1
[1,3,7,4,5,2,6] => 1
[1,3,7,4,5,6,2] => 1
[1,3,7,4,6,2,5] => 1
[1,3,7,4,6,5,2] => 1
[1,3,7,5,2,4,6] => 1
[1,3,7,5,2,6,4] => 1
[1,3,7,5,4,2,6] => 1
[1,3,7,5,4,6,2] => 1
[1,3,7,5,6,2,4] => 1
[1,3,7,5,6,4,2] => 1
[1,3,7,6,2,4,5] => 1
[1,3,7,6,2,5,4] => 1
[1,3,7,6,4,2,5] => 1
[1,3,7,6,4,5,2] => 1
[1,3,7,6,5,2,4] => 1
[1,3,7,6,5,4,2] => 1
[1,4,2,3,5,6,7] => 1
[1,4,2,3,5,7,6] => 1
[1,4,2,3,6,5,7] => 1
[1,4,2,3,6,7,5] => 1
[1,4,2,3,7,5,6] => 1
[1,4,2,3,7,6,5] => 1
[1,4,2,5,3,6,7] => 1
[1,4,2,5,3,7,6] => 1
[1,4,2,5,6,3,7] => 1
[1,4,2,5,6,7,3] => 1
[1,4,2,5,7,3,6] => 1
[1,4,2,5,7,6,3] => 1
[1,4,2,6,3,5,7] => 1
[1,4,2,6,3,7,5] => 1
[1,4,2,6,5,3,7] => 1
[1,4,2,6,5,7,3] => 1
[1,4,2,6,7,3,5] => 1
[1,4,2,6,7,5,3] => 1
[1,4,2,7,3,5,6] => 1
[1,4,2,7,3,6,5] => 1
[1,4,2,7,5,3,6] => 1
[1,4,2,7,5,6,3] => 1
[1,4,2,7,6,3,5] => 1
[1,4,2,7,6,5,3] => 1
[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] => 1
[1,4,3,2,7,5,6] => 1
[1,4,3,2,7,6,5] => 1
[1,4,3,5,2,6,7] => 1
[1,4,3,5,2,7,6] => 1
[1,4,3,5,6,2,7] => 1
[1,4,3,5,6,7,2] => 1
[1,4,3,5,7,2,6] => 1
[1,4,3,5,7,6,2] => 1
[1,4,3,6,2,5,7] => 1
[1,4,3,6,2,7,5] => 1
[1,4,3,6,5,2,7] => 1
[1,4,3,6,5,7,2] => 1
[1,4,3,6,7,2,5] => 1
[1,4,3,6,7,5,2] => 1
[1,4,3,7,2,5,6] => 1
[1,4,3,7,2,6,5] => 1
[1,4,3,7,5,2,6] => 1
[1,4,3,7,5,6,2] => 1
[1,4,3,7,6,2,5] => 1
[1,4,3,7,6,5,2] => 1
[1,4,5,2,3,6,7] => 1
[1,4,5,2,3,7,6] => 1
[1,4,5,2,6,3,7] => 1
[1,4,5,2,6,7,3] => 1
[1,4,5,2,7,3,6] => 1
[1,4,5,2,7,6,3] => 1
[1,4,5,3,2,6,7] => 1
[1,4,5,3,2,7,6] => 1
[1,4,5,3,6,2,7] => 1
[1,4,5,3,6,7,2] => 1
[1,4,5,3,7,2,6] => 1
[1,4,5,3,7,6,2] => 1
[1,4,5,6,2,3,7] => 1
[1,4,5,6,2,7,3] => 1
[1,4,5,6,3,2,7] => 1
[1,4,5,6,3,7,2] => 1
[1,4,5,6,7,2,3] => 1
[1,4,5,6,7,3,2] => 1
[1,4,5,7,2,3,6] => 1
[1,4,5,7,2,6,3] => 1
[1,4,5,7,3,2,6] => 1
[1,4,5,7,3,6,2] => 1
[1,4,5,7,6,2,3] => 1
[1,4,5,7,6,3,2] => 1
[1,4,6,2,3,5,7] => 1
[1,4,6,2,3,7,5] => 1
[1,4,6,2,5,3,7] => 1
[1,4,6,2,5,7,3] => 1
[1,4,6,2,7,3,5] => 1
[1,4,6,2,7,5,3] => 1
[1,4,6,3,2,5,7] => 1
[1,4,6,3,2,7,5] => 1
[1,4,6,3,5,2,7] => 1
[1,4,6,3,5,7,2] => 1
[1,4,6,3,7,2,5] => 1
[1,4,6,3,7,5,2] => 1
[1,4,6,5,2,3,7] => 1
[1,4,6,5,2,7,3] => 1
[1,4,6,5,3,2,7] => 1
[1,4,6,5,3,7,2] => 1
click to show generating function       
Description
The number of left-to-right-minima of a permutation.
An integer $\sigma_i$ in the one-line notation of a permutation $\sigma$ is a left-to-right-minimum if there does not exist a j < i such that $\sigma_j < \sigma_i$.
Code
def statistic(pi):
    pi = list(pi)
    i = len(pi)+1; count = 0
    for j in range(len(pi)):
        if pi[j] < i:
            i = pi[j] 
            count += 1
    return count

Created
Jun 28, 2016 at 17:09 by Christian Stump
Updated
Mar 18, 2019 at 11:16 by Henning Ulfarsson