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*       www.FindStat.org - The Combinatorial Statistic Finder               *
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*       Copyright (C) 2019 The FindStatCrew <info@findstat.org>             *
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Statistic identifier: St001313

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

-----------------------------------------------------------------------------
Description: The number of Dyck paths above the lattice path given by a binary word.

One may treat a binary word as a lattice path starting at the origin and treating $1$'s as steps $(1,0)$ and  $0$'s as steps $(0,1)$. Given a binary word $w$, this statistic counts the number of lattice paths from the origin to the same endpoint as $w$ that stay weakly above $w$.

See [[St001312]] for this statistic on compositions treated as bounce paths.

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References: 

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Code:
def lattice_paths_above_boundary(B):
    B = list(B)
    if sum(B) == 0:
        return [B]
    else:
        paths = [ B[:1] + p for p in lattice_paths_above_boundary(B[1:]) ]
        if B[0] == 0:
            i = B.index(1)
            B = B[:i] + B[i+1:]
            paths.extend( [ [1] + p for p in lattice_paths_above_boundary(B) ] )
        return paths

def statistic(w):
    return len(lattice_paths_above_boundary(w))

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

0         => 1
1         => 1
00        => 1
01        => 2
10        => 1
11        => 1
000       => 1
001       => 3
010       => 2
011       => 3
100       => 1
101       => 2
110       => 1
111       => 1
0000      => 1
0001      => 4
0010      => 3
0011      => 6
0100      => 2
0101      => 5
0110      => 3
0111      => 4
1000      => 1
1001      => 3
1010      => 2
1011      => 3
1100      => 1
1101      => 2
1110      => 1
1111      => 1
00000     => 1
00001     => 5
00010     => 4
00011     => 10
00100     => 3
00101     => 9
00110     => 6
00111     => 10
01000     => 2
01001     => 7
01010     => 5
01011     => 9
01100     => 3
01101     => 7
01110     => 4
01111     => 5
10000     => 1
10001     => 4
10010     => 3
10011     => 6
10100     => 2
10101     => 5
10110     => 3
10111     => 4
11000     => 1
11001     => 3
11010     => 2
11011     => 3
11100     => 1
11101     => 2
11110     => 1
11111     => 1
000000    => 1
000001    => 6
000010    => 5
000011    => 15
000100    => 4
000101    => 14
000110    => 10
000111    => 20
001000    => 3
001001    => 12
001010    => 9
001011    => 19
001100    => 6
001101    => 16
001110    => 10
001111    => 15
010000    => 2
010001    => 9
010010    => 7
010011    => 16
010100    => 5
010101    => 14
010110    => 9
010111    => 14
011000    => 3
011001    => 10
011010    => 7
011011    => 12
011100    => 4
011101    => 9
011110    => 5
011111    => 6
100000    => 1
100001    => 5
100010    => 4
100011    => 10
100100    => 3
100101    => 9
100110    => 6
100111    => 10
101000    => 2
101001    => 7
101010    => 5
101011    => 9
101100    => 3
101101    => 7
101110    => 4
101111    => 5
110000    => 1
110001    => 4
110010    => 3
110011    => 6
110100    => 2
110101    => 5
110110    => 3
110111    => 4
111000    => 1
111001    => 3
111010    => 2
111011    => 3
111100    => 1
111101    => 2
111110    => 1
111111    => 1
0000000   => 1
0000001   => 7
0000010   => 6
0000011   => 21
0000100   => 5
0000101   => 20
0000110   => 15
0000111   => 35
0001000   => 4
0001001   => 18
0001010   => 14
0001011   => 34
0001100   => 10
0001101   => 30
0001110   => 20
0001111   => 35
0010000   => 3
0010001   => 15
0010010   => 12
0010011   => 31
0010100   => 9
0010101   => 28
0010110   => 19
0010111   => 34
0011000   => 6
0011001   => 22
0011010   => 16
0011011   => 31
0011100   => 10
0011101   => 25
0011110   => 15
0011111   => 21
0100000   => 2
0100001   => 11
0100010   => 9
0100011   => 25
0100100   => 7
0100101   => 23
0100110   => 16
0100111   => 30
0101000   => 5
0101001   => 19
0101010   => 14
0101011   => 28
0101100   => 9
0101101   => 23
0101110   => 14
0101111   => 20
0110000   => 3
0110001   => 13
0110010   => 10
0110011   => 22
0110100   => 7
0110101   => 19
0110110   => 12
0110111   => 18
0111000   => 4
0111001   => 13
0111010   => 9
0111011   => 15
0111100   => 5
0111101   => 11
0111110   => 6
0111111   => 7
1000000   => 1
1000001   => 6
1000010   => 5
1000011   => 15
1000100   => 4
1000101   => 14
1000110   => 10
1000111   => 20
1001000   => 3
1001001   => 12
1001010   => 9
1001011   => 19
1001100   => 6
1001101   => 16
1001110   => 10
1001111   => 15
1010000   => 2
1010001   => 9
1010010   => 7
1010011   => 16
1010100   => 5
1010101   => 14
1010110   => 9
1010111   => 14
1011000   => 3
1011001   => 10
1011010   => 7
1011011   => 12
1011100   => 4
1011101   => 9
1011110   => 5
1011111   => 6
1100000   => 1
1100001   => 5
1100010   => 4
1100011   => 10
1100100   => 3
1100101   => 9
1100110   => 6
1100111   => 10
1101000   => 2
1101001   => 7
1101010   => 5
1101011   => 9
1101100   => 3
1101101   => 7
1101110   => 4
1101111   => 5
1110000   => 1
1110001   => 4
1110010   => 3
1110011   => 6
1110100   => 2
1110101   => 5
1110110   => 3
1110111   => 4
1111000   => 1
1111001   => 3
1111010   => 2
1111011   => 3
1111100   => 1
1111101   => 2
1111110   => 1
1111111   => 1
00000000  => 1
00000001  => 8
00000010  => 7
00000011  => 28
00000100  => 6
00000101  => 27
00000110  => 21
00000111  => 56
00001000  => 5
00001001  => 25
00001010  => 20
00001011  => 55
00001100  => 15
00001101  => 50
00001110  => 35
00001111  => 70
00010000  => 4
00010001  => 22
00010010  => 18
00010011  => 52
00010100  => 14
00010101  => 48
00010110  => 34
00010111  => 69
00011000  => 10
00011001  => 40
00011010  => 30
00011011  => 65
00011100  => 20
00011101  => 55
00011110  => 35
00011111  => 56
00100000  => 3
00100001  => 18
00100010  => 15
00100011  => 46
00100100  => 12
00100101  => 43
00100110  => 31
00100111  => 65
00101000  => 9
00101001  => 37
00101010  => 28
00101011  => 62
00101100  => 19
00101101  => 53
00101110  => 34
00101111  => 55
00110000  => 6
00110001  => 28
00110010  => 22
00110011  => 53
00110100  => 16
00110101  => 47
00110110  => 31
00110111  => 52
00111000  => 10
00111001  => 35
00111010  => 25
00111011  => 46
00111100  => 15
00111101  => 36
00111110  => 21
00111111  => 28
01000000  => 2
01000001  => 13
01000010  => 11
01000011  => 36
01000100  => 9
01000101  => 34
01000110  => 25
01000111  => 55
01001000  => 7
01001001  => 30
01001010  => 23
01001011  => 53
01001100  => 16
01001101  => 46
01001110  => 30
01001111  => 50
01010000  => 5
01010001  => 24
01010010  => 19
01010011  => 47
01010100  => 14
01010101  => 42
01010110  => 28
01010111  => 48
01011000  => 9
01011001  => 32
01011010  => 23
01011011  => 43
01011100  => 14
01011101  => 34
01011110  => 20
01011111  => 27
01100000  => 3
01100001  => 16
01100010  => 13
01100011  => 35
01100100  => 10
01100101  => 32
01100110  => 22
01100111  => 40
01101000  => 7
01101001  => 26
01101010  => 19
01101011  => 37
01101100  => 12
01101101  => 30
01101110  => 18
01101111  => 25
01110000  => 4
01110001  => 17
01110010  => 13
01110011  => 28
01110100  => 9
01110101  => 24
01110110  => 15
01110111  => 22
01111000  => 5
01111001  => 16
01111010  => 11
01111011  => 18
01111100  => 6
01111101  => 13
01111110  => 7
01111111  => 8
10000000  => 1
10000001  => 7
10000010  => 6
10000011  => 21
10000100  => 5
10000101  => 20
10000110  => 15
10000111  => 35
10001000  => 4
10001001  => 18
10001010  => 14
10001011  => 34
10001100  => 10
10001101  => 30
10001110  => 20
10001111  => 35
10010000  => 3
10010001  => 15
10010010  => 12
10010011  => 31
10010100  => 9
10010101  => 28
10010110  => 19
10010111  => 34
10011000  => 6
10011001  => 22
10011010  => 16
10011011  => 31
10011100  => 10
10011101  => 25
10011110  => 15
10011111  => 21
10100000  => 2
10100001  => 11
10100010  => 9
10100011  => 25
10100100  => 7
10100101  => 23
10100110  => 16
10100111  => 30
10101000  => 5
10101001  => 19
10101010  => 14
10101011  => 28
10101100  => 9
10101101  => 23
10101110  => 14
10101111  => 20
10110000  => 3
10110001  => 13
10110010  => 10
10110011  => 22
10110100  => 7
10110101  => 19
10110110  => 12
10110111  => 18
10111000  => 4
10111001  => 13
10111010  => 9
10111011  => 15
10111100  => 5
10111101  => 11
10111110  => 6
10111111  => 7
11000000  => 1
11000001  => 6
11000010  => 5
11000011  => 15
11000100  => 4
11000101  => 14
11000110  => 10
11000111  => 20
11001000  => 3
11001001  => 12
11001010  => 9
11001011  => 19
11001100  => 6
11001101  => 16
11001110  => 10
11001111  => 15
11010000  => 2
11010001  => 9
11010010  => 7
11010011  => 16
11010100  => 5
11010101  => 14
11010110  => 9
11010111  => 14
11011000  => 3
11011001  => 10
11011010  => 7
11011011  => 12
11011100  => 4
11011101  => 9
11011110  => 5
11011111  => 6
11100000  => 1
11100001  => 5
11100010  => 4
11100011  => 10
11100100  => 3
11100101  => 9
11100110  => 6
11100111  => 10
11101000  => 2
11101001  => 7
11101010  => 5
11101011  => 9
11101100  => 3
11101101  => 7
11101110  => 4
11101111  => 5
11110000  => 1
11110001  => 4
11110010  => 3
11110011  => 6
11110100  => 2
11110101  => 5
11110110  => 3
11110111  => 4
11111000  => 1
11111001  => 3
11111010  => 2
11111011  => 3
11111100  => 1
11111101  => 2
11111110  => 1
11111111  => 1
000000000 => 1
000000001 => 9
000000010 => 8
000000011 => 36
000000100 => 7
000000101 => 35
000000110 => 28
000000111 => 84
000001000 => 6
000001001 => 33
000001010 => 27
000001011 => 83
000001100 => 21
000001101 => 77
000001110 => 56
000001111 => 126
000010000 => 5
000010001 => 30
000010010 => 25
000010011 => 80
000010100 => 20
000010101 => 75
000010110 => 55
000010111 => 125
000011000 => 15
000011001 => 65
000011010 => 50
000011011 => 120
000011100 => 35
000011101 => 105
000011110 => 70
000011111 => 126
000100000 => 4
000100001 => 26
000100010 => 22
000100011 => 74
000100100 => 18
000100101 => 70
000100110 => 52
000100111 => 121
000101000 => 14
000101001 => 62
000101010 => 48
000101011 => 117
000101100 => 34
000101101 => 103
000101110 => 69
000101111 => 125
000110000 => 10
000110001 => 50
000110010 => 40
000110011 => 105
000110100 => 30
000110101 => 95
000110110 => 65
000110111 => 121
000111000 => 20
000111001 => 75
000111010 => 55
000111011 => 111
000111100 => 35
000111101 => 91
000111110 => 56
000111111 => 84
001000000 => 3
001000001 => 21
001000010 => 18
001000011 => 64
001000100 => 15
001000101 => 61
001000110 => 46
001000111 => 111
001001000 => 12
001001001 => 55
001001010 => 43
001001011 => 108
001001100 => 31
001001101 => 96
001001110 => 65
001001111 => 120
001010000 => 9
001010001 => 46
001010010 => 37
001010011 => 99
001010100 => 28
001010101 => 90
001010110 => 62
001010111 => 117
001011000 => 19
001011001 => 72
001011010 => 53
001011011 => 108
001011100 => 34
001011101 => 89
001011110 => 55
001011111 => 83
001100000 => 6
001100001 => 34
001100010 => 28
001100011 => 81
001100100 => 22
001100101 => 75
001100110 => 53
001100111 => 105
001101000 => 16
001101001 => 63
001101010 => 47
001101011 => 99
001101100 => 31
001101101 => 83
001101110 => 52
001101111 => 80
001110000 => 10
001110001 => 45
001110010 => 35
001110011 => 81
001110100 => 25
001110101 => 71
001110110 => 46
001110111 => 74
001111000 => 15
001111001 => 51
001111010 => 36
001111011 => 64
001111100 => 21
001111101 => 49
001111110 => 28
001111111 => 36
010000000 => 2
010000001 => 15
010000010 => 13
010000011 => 49
010000100 => 11
010000101 => 47
010000110 => 36
010000111 => 91
010001000 => 9
010001001 => 43
010001010 => 34
010001011 => 89
010001100 => 25
010001101 => 80
010001110 => 55
010001111 => 105
010010000 => 7
010010001 => 37
010010010 => 30
010010011 => 83
010010100 => 23
010010101 => 76
010010110 => 53
010010111 => 103
010011000 => 16
010011001 => 62
010011010 => 46
010011011 => 96
010011100 => 30
010011101 => 80
010011110 => 50
010011111 => 77
010100000 => 5
010100001 => 29
010100010 => 24
010100011 => 71
010100100 => 19
010100101 => 66
010100110 => 47
010100111 => 95
010101000 => 14
010101001 => 56
010101010 => 42
010101011 => 90
010101100 => 28
010101101 => 76
010101110 => 48
010101111 => 75
010110000 => 9
010110001 => 41
010110010 => 32
010110011 => 75
010110100 => 23
010110101 => 66
010110110 => 43
010110111 => 70
010111000 => 14
010111001 => 48
010111010 => 34
010111011 => 61
010111100 => 20
010111101 => 47
010111110 => 27
010111111 => 35
011000000 => 3
011000001 => 19
011000010 => 16
011000011 => 51
011000100 => 13
011000101 => 48
011000110 => 35
011000111 => 75
011001000 => 10
011001001 => 42
011001010 => 32
011001011 => 72
011001100 => 22
011001101 => 62
011001110 => 40
011001111 => 65
011010000 => 7
011010001 => 33
011010010 => 26
011010011 => 63
011010100 => 19
011010101 => 56
011010110 => 37
011010111 => 62
011011000 => 12
011011001 => 42
011011010 => 30
011011011 => 55
011011100 => 18
011011101 => 43
011011110 => 25
011011111 => 33
011100000 => 4
011100001 => 21
011100010 => 17
011100011 => 45
011100100 => 13
011100101 => 41
011100110 => 28
011100111 => 50
011101000 => 9
011101001 => 33
011101010 => 24
011101011 => 46
011101100 => 15
011101101 => 37
011101110 => 22
011101111 => 30
011110000 => 5
011110001 => 21
011110010 => 16
011110011 => 34
011110100 => 11
011110101 => 29
011110110 => 18
011110111 => 26
011111000 => 6
011111001 => 19
011111010 => 13
011111011 => 21
011111100 => 7
011111101 => 15
011111110 => 8
011111111 => 9
100000000 => 1
100000001 => 8
100000010 => 7
100000011 => 28
100000100 => 6
100000101 => 27
100000110 => 21
100000111 => 56
100001000 => 5
100001001 => 25
100001010 => 20
100001011 => 55
100001100 => 15
100001101 => 50
100001110 => 35
100001111 => 70
100010000 => 4
100010001 => 22
100010010 => 18
100010011 => 52
100010100 => 14
100010101 => 48
100010110 => 34
100010111 => 69
100011000 => 10
100011001 => 40
100011010 => 30
100011011 => 65
100011100 => 20
100011101 => 55
100011110 => 35
100011111 => 56
100100000 => 3
100100001 => 18
100100010 => 15
100100011 => 46
100100100 => 12
100100101 => 43
100100110 => 31
100100111 => 65
100101000 => 9
100101001 => 37
100101010 => 28
100101011 => 62
100101100 => 19
100101101 => 53
100101110 => 34
100101111 => 55
100110000 => 6
100110001 => 28
100110010 => 22
100110011 => 53
100110100 => 16
100110101 => 47
100110110 => 31
100110111 => 52
100111000 => 10
100111001 => 35
100111010 => 25
100111011 => 46
100111100 => 15
100111101 => 36
100111110 => 21
100111111 => 28
101000000 => 2
101000001 => 13
101000010 => 11
101000011 => 36
101000100 => 9
101000101 => 34
101000110 => 25
101000111 => 55
101001000 => 7
101001001 => 30
101001010 => 23
101001011 => 53
101001100 => 16
101001101 => 46
101001110 => 30
101001111 => 50
101010000 => 5
101010001 => 24
101010010 => 19
101010011 => 47
101010100 => 14
101010101 => 42
101010110 => 28
101010111 => 48
101011000 => 9
101011001 => 32
101011010 => 23
101011011 => 43
101011100 => 14
101011101 => 34
101011110 => 20
101011111 => 27
101100000 => 3
101100001 => 16
101100010 => 13
101100011 => 35
101100100 => 10
101100101 => 32
101100110 => 22
101100111 => 40
101101000 => 7
101101001 => 26
101101010 => 19
101101011 => 37
101101100 => 12
101101101 => 30
101101110 => 18
101101111 => 25
101110000 => 4
101110001 => 17
101110010 => 13
101110011 => 28
101110100 => 9
101110101 => 24
101110110 => 15
101110111 => 22
101111000 => 5
101111001 => 16
101111010 => 11
101111011 => 18
101111100 => 6
101111101 => 13
101111110 => 7
101111111 => 8
110000000 => 1
110000001 => 7
110000010 => 6
110000011 => 21
110000100 => 5
110000101 => 20
110000110 => 15
110000111 => 35
110001000 => 4
110001001 => 18
110001010 => 14
110001011 => 34
110001100 => 10
110001101 => 30
110001110 => 20
110001111 => 35
110010000 => 3
110010001 => 15
110010010 => 12
110010011 => 31
110010100 => 9
110010101 => 28
110010110 => 19
110010111 => 34
110011000 => 6
110011001 => 22
110011010 => 16
110011011 => 31
110011100 => 10
110011101 => 25
110011110 => 15
110011111 => 21
110100000 => 2
110100001 => 11
110100010 => 9
110100011 => 25
110100100 => 7
110100101 => 23
110100110 => 16
110100111 => 30
110101000 => 5
110101001 => 19
110101010 => 14
110101011 => 28
110101100 => 9
110101101 => 23
110101110 => 14
110101111 => 20
110110000 => 3
110110001 => 13
110110010 => 10
110110011 => 22
110110100 => 7
110110101 => 19
110110110 => 12
110110111 => 18
110111000 => 4
110111001 => 13
110111010 => 9
110111011 => 15
110111100 => 5
110111101 => 11
110111110 => 6
110111111 => 7
111000000 => 1
111000001 => 6
111000010 => 5
111000011 => 15
111000100 => 4
111000101 => 14
111000110 => 10
111000111 => 20
111001000 => 3
111001001 => 12
111001010 => 9
111001011 => 19
111001100 => 6
111001101 => 16
111001110 => 10
111001111 => 15
111010000 => 2
111010001 => 9
111010010 => 7
111010011 => 16
111010100 => 5
111010101 => 14
111010110 => 9
111010111 => 14
111011000 => 3
111011001 => 10
111011010 => 7
111011011 => 12
111011100 => 4
111011101 => 9
111011110 => 5
111011111 => 6
111100000 => 1
111100001 => 5
111100010 => 4
111100011 => 10
111100100 => 3
111100101 => 9
111100110 => 6
111100111 => 10
111101000 => 2
111101001 => 7
111101010 => 5
111101011 => 9
111101100 => 3
111101101 => 7
111101110 => 4
111101111 => 5
111110000 => 1
111110001 => 4
111110010 => 3
111110011 => 6
111110100 => 2
111110101 => 5
111110110 => 3
111110111 => 4
111111000 => 1
111111001 => 3
111111010 => 2
111111011 => 3
111111100 => 1
111111101 => 2
111111110 => 1
111111111 => 1

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Created: Dec 12, 2018 at 14:54 by Christian Stump

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Last Updated: Dec 12, 2018 at 14:54 by Christian Stump