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*       www.FindStat.org - The Combinatorial Statistic Finder               *
*                                                                           *
*       Copyright (C) 2019 The FindStatCrew <info@findstat.org>             *
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*    This information is distributed in the hope that it will be useful,    *
*    but WITHOUT ANY WARRANTY; without even the implied warranty of         *
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-----------------------------------------------------------------------------
Statistic identifier: St000348

-----------------------------------------------------------------------------
Collection: Binary words

-----------------------------------------------------------------------------
Description: The non-inversion sum of a binary word.

A pair $a < b$ is an noninversion of a binary word $w = w_1 \cdots w_n$ if $w_a < w_b$. The non-inversion sum is given by $\sum(b-a)$ over all non-inversions of $w$.

-----------------------------------------------------------------------------
References: [1]   The non-inversion sum of a permutation. [[St000341]]

-----------------------------------------------------------------------------
Code:
def statistic(w):
        return sum( b-a for a in range(len(w)) for b in range(a,len(w)) if w[a] < w[b] )


-----------------------------------------------------------------------------
Statistic values:

0          => 0
1          => 0
00         => 0
01         => 1
10         => 0
11         => 0
000        => 0
001        => 3
010        => 1
011        => 3
100        => 0
101        => 1
110        => 0
111        => 0
0000       => 0
0001       => 6
0010       => 3
0011       => 8
0100       => 1
0101       => 5
0110       => 3
0111       => 6
1000       => 0
1001       => 3
1010       => 1
1011       => 3
1100       => 0
1101       => 1
1110       => 0
1111       => 0
00000      => 0
00001      => 10
00010      => 6
00011      => 15
00100      => 3
00101      => 11
00110      => 8
00111      => 15
01000      => 1
01001      => 8
01010      => 5
01011      => 11
01100      => 3
01101      => 8
01110      => 6
01111      => 10
10000      => 0
10001      => 6
10010      => 3
10011      => 8
10100      => 1
10101      => 5
10110      => 3
10111      => 6
11000      => 0
11001      => 3
11010      => 1
11011      => 3
11100      => 0
11101      => 1
11110      => 0
11111      => 0
000000     => 0
000001     => 15
000010     => 10
000011     => 24
000100     => 6
000101     => 19
000110     => 15
000111     => 27
001000     => 3
001001     => 15
001010     => 11
001011     => 22
001100     => 8
001101     => 18
001110     => 15
001111     => 24
010000     => 1
010001     => 12
010010     => 8
010011     => 18
010100     => 5
010101     => 14
010110     => 11
010111     => 19
011000     => 3
011001     => 11
011010     => 8
011011     => 15
011100     => 6
011101     => 12
011110     => 10
011111     => 15
100000     => 0
100001     => 10
100010     => 6
100011     => 15
100100     => 3
100101     => 11
100110     => 8
100111     => 15
101000     => 1
101001     => 8
101010     => 5
101011     => 11
101100     => 3
101101     => 8
101110     => 6
101111     => 10
110000     => 0
110001     => 6
110010     => 3
110011     => 8
110100     => 1
110101     => 5
110110     => 3
110111     => 6
111000     => 0
111001     => 3
111010     => 1
111011     => 3
111100     => 0
111101     => 1
111110     => 0
111111     => 0
0000000    => 0
0000001    => 21
0000010    => 15
0000011    => 35
0000100    => 10
0000101    => 29
0000110    => 24
0000111    => 42
0001000    => 6
0001001    => 24
0001010    => 19
0001011    => 36
0001100    => 15
0001101    => 31
0001110    => 27
0001111    => 42
0010000    => 3
0010001    => 20
0010010    => 15
0010011    => 31
0010100    => 11
0010101    => 26
0010110    => 22
0010111    => 36
0011000    => 8
0011001    => 22
0011010    => 18
0011011    => 31
0011100    => 15
0011101    => 27
0011110    => 24
0011111    => 35
0100000    => 1
0100001    => 17
0100010    => 12
0100011    => 27
0100100    => 8
0100101    => 22
0100110    => 18
0100111    => 31
0101000    => 5
0101001    => 18
0101010    => 14
0101011    => 26
0101100    => 11
0101101    => 22
0101110    => 19
0101111    => 29
0110000    => 3
0110001    => 15
0110010    => 11
0110011    => 22
0110100    => 8
0110101    => 18
0110110    => 15
0110111    => 24
0111000    => 6
0111001    => 15
0111010    => 12
0111011    => 20
0111100    => 10
0111101    => 17
0111110    => 15
0111111    => 21
1000000    => 0
1000001    => 15
1000010    => 10
1000011    => 24
1000100    => 6
1000101    => 19
1000110    => 15
1000111    => 27
1001000    => 3
1001001    => 15
1001010    => 11
1001011    => 22
1001100    => 8
1001101    => 18
1001110    => 15
1001111    => 24
1010000    => 1
1010001    => 12
1010010    => 8
1010011    => 18
1010100    => 5
1010101    => 14
1010110    => 11
1010111    => 19
1011000    => 3
1011001    => 11
1011010    => 8
1011011    => 15
1011100    => 6
1011101    => 12
1011110    => 10
1011111    => 15
1100000    => 0
1100001    => 10
1100010    => 6
1100011    => 15
1100100    => 3
1100101    => 11
1100110    => 8
1100111    => 15
1101000    => 1
1101001    => 8
1101010    => 5
1101011    => 11
1101100    => 3
1101101    => 8
1101110    => 6
1101111    => 10
1110000    => 0
1110001    => 6
1110010    => 3
1110011    => 8
1110100    => 1
1110101    => 5
1110110    => 3
1110111    => 6
1111000    => 0
1111001    => 3
1111010    => 1
1111011    => 3
1111100    => 0
1111101    => 1
1111110    => 0
1111111    => 0
00000000   => 0
00000001   => 28
00000010   => 21
00000011   => 48
00000100   => 15
00000101   => 41
00000110   => 35
00000111   => 60
00001000   => 10
00001001   => 35
00001010   => 29
00001011   => 53
00001100   => 24
00001101   => 47
00001110   => 42
00001111   => 64
00010000   => 6
00010001   => 30
00010010   => 24
00010011   => 47
00010100   => 19
00010101   => 41
00010110   => 36
00010111   => 57
00011000   => 15
00011001   => 36
00011010   => 31
00011011   => 51
00011100   => 27
00011101   => 46
00011110   => 42
00011111   => 60
00100000   => 3
00100001   => 26
00100010   => 20
00100011   => 42
00100100   => 15
00100101   => 36
00100110   => 31
00100111   => 51
00101000   => 11
00101001   => 31
00101010   => 26
00101011   => 45
00101100   => 22
00101101   => 40
00101110   => 36
00101111   => 53
00110000   => 8
00110001   => 27
00110010   => 22
00110011   => 40
00110100   => 18
00110101   => 35
00110110   => 31
00110111   => 47
00111000   => 15
00111001   => 31
00111010   => 27
00111011   => 42
00111100   => 24
00111101   => 38
00111110   => 35
00111111   => 48
01000000   => 1
01000001   => 23
01000010   => 17
01000011   => 38
01000100   => 12
01000101   => 32
01000110   => 27
01000111   => 46
01001000   => 8
01001001   => 27
01001010   => 22
01001011   => 40
01001100   => 18
01001101   => 35
01001110   => 31
01001111   => 47
01010000   => 5
01010001   => 23
01010010   => 18
01010011   => 35
01010100   => 14
01010101   => 30
01010110   => 26
01010111   => 41
01011000   => 11
01011001   => 26
01011010   => 22
01011011   => 36
01011100   => 19
01011101   => 32
01011110   => 29
01011111   => 41
01100000   => 3
01100001   => 20
01100010   => 15
01100011   => 31
01100100   => 11
01100101   => 26
01100110   => 22
01100111   => 36
01101000   => 8
01101001   => 22
01101010   => 18
01101011   => 31
01101100   => 15
01101101   => 27
01101110   => 24
01101111   => 35
01110000   => 6
01110001   => 19
01110010   => 15
01110011   => 27
01110100   => 12
01110101   => 23
01110110   => 20
01110111   => 30
01111000   => 10
01111001   => 20
01111010   => 17
01111011   => 26
01111100   => 15
01111101   => 23
01111110   => 21
01111111   => 28
10000000   => 0
10000001   => 21
10000010   => 15
10000011   => 35
10000100   => 10
10000101   => 29
10000110   => 24
10000111   => 42
10001000   => 6
10001001   => 24
10001010   => 19
10001011   => 36
10001100   => 15
10001101   => 31
10001110   => 27
10001111   => 42
10010000   => 3
10010001   => 20
10010010   => 15
10010011   => 31
10010100   => 11
10010101   => 26
10010110   => 22
10010111   => 36
10011000   => 8
10011001   => 22
10011010   => 18
10011011   => 31
10011100   => 15
10011101   => 27
10011110   => 24
10011111   => 35
10100000   => 1
10100001   => 17
10100010   => 12
10100011   => 27
10100100   => 8
10100101   => 22
10100110   => 18
10100111   => 31
10101000   => 5
10101001   => 18
10101010   => 14
10101011   => 26
10101100   => 11
10101101   => 22
10101110   => 19
10101111   => 29
10110000   => 3
10110001   => 15
10110010   => 11
10110011   => 22
10110100   => 8
10110101   => 18
10110110   => 15
10110111   => 24
10111000   => 6
10111001   => 15
10111010   => 12
10111011   => 20
10111100   => 10
10111101   => 17
10111110   => 15
10111111   => 21
11000000   => 0
11000001   => 15
11000010   => 10
11000011   => 24
11000100   => 6
11000101   => 19
11000110   => 15
11000111   => 27
11001000   => 3
11001001   => 15
11001010   => 11
11001011   => 22
11001100   => 8
11001101   => 18
11001110   => 15
11001111   => 24
11010000   => 1
11010001   => 12
11010010   => 8
11010011   => 18
11010100   => 5
11010101   => 14
11010110   => 11
11010111   => 19
11011000   => 3
11011001   => 11
11011010   => 8
11011011   => 15
11011100   => 6
11011101   => 12
11011110   => 10
11011111   => 15
11100000   => 0
11100001   => 10
11100010   => 6
11100011   => 15
11100100   => 3
11100101   => 11
11100110   => 8
11100111   => 15
11101000   => 1
11101001   => 8
11101010   => 5
11101011   => 11
11101100   => 3
11101101   => 8
11101110   => 6
11101111   => 10
11110000   => 0
11110001   => 6
11110010   => 3
11110011   => 8
11110100   => 1
11110101   => 5
11110110   => 3
11110111   => 6
11111000   => 0
11111001   => 3
11111010   => 1
11111011   => 3
11111100   => 0
11111101   => 1
11111110   => 0
11111111   => 0
000000000  => 0
000000001  => 36
000000010  => 28
000000011  => 63
000000100  => 21
000000101  => 55
000000110  => 48
000000111  => 81
000001000  => 15
000001001  => 48
000001010  => 41
000001011  => 73
000001100  => 35
000001101  => 66
000001110  => 60
000001111  => 90
000010000  => 10
000010001  => 42
000010010  => 35
000010011  => 66
000010100  => 29
000010101  => 59
000010110  => 53
000010111  => 82
000011000  => 24
000011001  => 53
000011010  => 47
000011011  => 75
000011100  => 42
000011101  => 69
000011110  => 64
000011111  => 90
000100000  => 6
000100001  => 37
000100010  => 30
000100011  => 60
000100100  => 24
000100101  => 53
000100110  => 47
000100111  => 75
000101000  => 19
000101001  => 47
000101010  => 41
000101011  => 68
000101100  => 36
000101101  => 62
000101110  => 57
000101111  => 82
000110000  => 15
000110001  => 42
000110010  => 36
000110011  => 62
000110100  => 31
000110101  => 56
000110110  => 51
000110111  => 75
000111000  => 27
000111001  => 51
000111010  => 46
000111011  => 69
000111100  => 42
000111101  => 64
000111110  => 60
000111111  => 81
001000000  => 3
001000001  => 33
001000010  => 26
001000011  => 55
001000100  => 20
001000101  => 48
001000110  => 42
001000111  => 69
001001000  => 15
001001001  => 42
001001010  => 36
001001011  => 62
001001100  => 31
001001101  => 56
001001110  => 51
001001111  => 75
001010000  => 11
001010001  => 37
001010010  => 31
001010011  => 56
001010100  => 26
001010101  => 50
001010110  => 45
001010111  => 68
001011000  => 22
001011001  => 45
001011010  => 40
001011011  => 62
001011100  => 36
001011101  => 57
001011110  => 53
001011111  => 73
001100000  => 8
001100001  => 33
001100010  => 27
001100011  => 51
001100100  => 22
001100101  => 45
001100110  => 40
001100111  => 62
001101000  => 18
001101001  => 40
001101010  => 35
001101011  => 56
001101100  => 31
001101101  => 51
001101110  => 47
001101111  => 66
001110000  => 15
001110001  => 36
001110010  => 31
001110011  => 51
001110100  => 27
001110101  => 46
001110110  => 42
001110111  => 60
001111000  => 24
001111001  => 42
001111010  => 38
001111011  => 55
001111100  => 35
001111101  => 51
001111110  => 48
001111111  => 63
010000000  => 1
010000001  => 30
010000010  => 23
010000011  => 51
010000100  => 17
010000101  => 44
010000110  => 38
010000111  => 64
010001000  => 12
010001001  => 38
010001010  => 32
010001011  => 57
010001100  => 27
010001101  => 51
010001110  => 46
010001111  => 69
010010000  => 8
010010001  => 33
010010010  => 27
010010011  => 51
010010100  => 22
010010101  => 45
010010110  => 40
010010111  => 62
010011000  => 18
010011001  => 40
010011010  => 35
010011011  => 56
010011100  => 31
010011101  => 51
010011110  => 47
010011111  => 66
010100000  => 5
010100001  => 29
010100010  => 23
010100011  => 46
010100100  => 18
010100101  => 40
010100110  => 35
010100111  => 56
010101000  => 14
010101001  => 35
010101010  => 30
010101011  => 50
010101100  => 26
010101101  => 45
010101110  => 41
010101111  => 59
010110000  => 11
010110001  => 31
010110010  => 26
010110011  => 45
010110100  => 22
010110101  => 40
010110110  => 36
010110111  => 53
010111000  => 19
010111001  => 36
010111010  => 32
010111011  => 48
010111100  => 29
010111101  => 44
010111110  => 41
010111111  => 55
011000000  => 3
011000001  => 26
011000010  => 20
011000011  => 42
011000100  => 15
011000101  => 36
011000110  => 31
011000111  => 51
011001000  => 11
011001001  => 31
011001010  => 26
011001011  => 45
011001100  => 22
011001101  => 40
011001110  => 36
011001111  => 53
011010000  => 8
011010001  => 27
011010010  => 22
011010011  => 40
011010100  => 18
011010101  => 35
011010110  => 31
011010111  => 47
011011000  => 15
011011001  => 31
011011010  => 27
011011011  => 42
011011100  => 24
011011101  => 38
011011110  => 35
011011111  => 48
011100000  => 6
011100001  => 24
011100010  => 19
011100011  => 36
011100100  => 15
011100101  => 31
011100110  => 27
011100111  => 42
011101000  => 12
011101001  => 27
011101010  => 23
011101011  => 37
011101100  => 20
011101101  => 33
011101110  => 30
011101111  => 42
011110000  => 10
011110001  => 24
011110010  => 20
011110011  => 33
011110100  => 17
011110101  => 29
011110110  => 26
011110111  => 37
011111000  => 15
011111001  => 26
011111010  => 23
011111011  => 33
011111100  => 21
011111101  => 30
011111110  => 28
011111111  => 36
100000000  => 0
100000001  => 28
100000010  => 21
100000011  => 48
100000100  => 15
100000101  => 41
100000110  => 35
100000111  => 60
100001000  => 10
100001001  => 35
100001010  => 29
100001011  => 53
100001100  => 24
100001101  => 47
100001110  => 42
100001111  => 64
100010000  => 6
100010001  => 30
100010010  => 24
100010011  => 47
100010100  => 19
100010101  => 41
100010110  => 36
100010111  => 57
100011000  => 15
100011001  => 36
100011010  => 31
100011011  => 51
100011100  => 27
100011101  => 46
100011110  => 42
100011111  => 60
100100000  => 3
100100001  => 26
100100010  => 20
100100011  => 42
100100100  => 15
100100101  => 36
100100110  => 31
100100111  => 51
100101000  => 11
100101001  => 31
100101010  => 26
100101011  => 45
100101100  => 22
100101101  => 40
100101110  => 36
100101111  => 53
100110000  => 8
100110001  => 27
100110010  => 22
100110011  => 40
100110100  => 18
100110101  => 35
100110110  => 31
100110111  => 47
100111000  => 15
100111001  => 31
100111010  => 27
100111011  => 42
100111100  => 24
100111101  => 38
100111110  => 35
100111111  => 48
101000000  => 1
101000001  => 23
101000010  => 17
101000011  => 38
101000100  => 12
101000101  => 32
101000110  => 27
101000111  => 46
101001000  => 8
101001001  => 27
101001010  => 22
101001011  => 40
101001100  => 18
101001101  => 35
101001110  => 31
101001111  => 47
101010000  => 5
101010001  => 23
101010010  => 18
101010011  => 35
101010100  => 14
101010101  => 30
101010110  => 26
101010111  => 41
101011000  => 11
101011001  => 26
101011010  => 22
101011011  => 36
101011100  => 19
101011101  => 32
101011110  => 29
101011111  => 41
101100000  => 3
101100001  => 20
101100010  => 15
101100011  => 31
101100100  => 11
101100101  => 26
101100110  => 22
101100111  => 36
101101000  => 8
101101001  => 22
101101010  => 18
101101011  => 31
101101100  => 15
101101101  => 27
101101110  => 24
101101111  => 35
101110000  => 6
101110001  => 19
101110010  => 15
101110011  => 27
101110100  => 12
101110101  => 23
101110110  => 20
101110111  => 30
101111000  => 10
101111001  => 20
101111010  => 17
101111011  => 26
101111100  => 15
101111101  => 23
101111110  => 21
101111111  => 28
110000000  => 0
110000001  => 21
110000010  => 15
110000011  => 35
110000100  => 10
110000101  => 29
110000110  => 24
110000111  => 42
110001000  => 6
110001001  => 24
110001010  => 19
110001011  => 36
110001100  => 15
110001101  => 31
110001110  => 27
110001111  => 42
110010000  => 3
110010001  => 20
110010010  => 15
110010011  => 31
110010100  => 11
110010101  => 26
110010110  => 22
110010111  => 36
110011000  => 8
110011001  => 22
110011010  => 18
110011011  => 31
110011100  => 15
110011101  => 27
110011110  => 24
110011111  => 35
110100000  => 1
110100001  => 17
110100010  => 12
110100011  => 27
110100100  => 8
110100101  => 22
110100110  => 18
110100111  => 31
110101000  => 5
110101001  => 18
110101010  => 14
110101011  => 26
110101100  => 11
110101101  => 22
110101110  => 19
110101111  => 29
110110000  => 3
110110001  => 15
110110010  => 11
110110011  => 22
110110100  => 8
110110101  => 18
110110110  => 15
110110111  => 24
110111000  => 6
110111001  => 15
110111010  => 12
110111011  => 20
110111100  => 10
110111101  => 17
110111110  => 15
110111111  => 21
111000000  => 0
111000001  => 15
111000010  => 10
111000011  => 24
111000100  => 6
111000101  => 19
111000110  => 15
111000111  => 27
111001000  => 3
111001001  => 15
111001010  => 11
111001011  => 22
111001100  => 8
111001101  => 18
111001110  => 15
111001111  => 24
111010000  => 1
111010001  => 12
111010010  => 8
111010011  => 18
111010100  => 5
111010101  => 14
111010110  => 11
111010111  => 19
111011000  => 3
111011001  => 11
111011010  => 8
111011011  => 15
111011100  => 6
111011101  => 12
111011110  => 10
111011111  => 15
111100000  => 0
111100001  => 10
111100010  => 6
111100011  => 15
111100100  => 3
111100101  => 11
111100110  => 8
111100111  => 15
111101000  => 1
111101001  => 8
111101010  => 5
111101011  => 11
111101100  => 3
111101101  => 8
111101110  => 6
111101111  => 10
111110000  => 0
111110001  => 6
111110010  => 3
111110011  => 8
111110100  => 1
111110101  => 5
111110110  => 3
111110111  => 6
111111000  => 0
111111001  => 3
111111010  => 1
111111011  => 3
111111100  => 0
111111101  => 1
111111110  => 0
111111111  => 0
0000000001 => 45
0010000001 => 41
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Created: Dec 26, 2015 at 14:39 by Christian Stump

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Last Updated: Dec 26, 2015 at 14:39 by Christian Stump