Identifier
- St001421: Binary words ⟶ ℤ
Values
=>
0=>0
1=>0
00=>0
01=>0
10=>1
11=>0
000=>0
001=>0
010=>1
011=>0
100=>1
101=>1
110=>1
111=>0
0000=>0
0001=>0
0010=>1
0011=>0
0100=>1
0101=>1
0110=>1
0111=>0
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1001=>1
1010=>2
1011=>1
1100=>2
1101=>1
1110=>1
1111=>0
00000=>0
00001=>0
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00100=>1
00101=>1
00110=>1
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01000=>1
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110110=>1
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0000000=>0
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00000000=>0
00000001=>0
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100011101=>4
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110111101=>1
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111000000=>3
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111000010=>3
111000011=>3
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111001111=>2
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111010001=>4
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111010111=>2
111011000=>2
111011001=>2
111011010=>2
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111011100=>2
111011101=>1
111011110=>1
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111100000=>4
111100001=>4
111100010=>3
111100011=>3
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111100101=>2
111100110=>3
111100111=>2
111101000=>4
111101001=>3
111101010=>3
111101011=>2
111101100=>2
111101101=>1
111101110=>1
111101111=>1
111110000=>4
111110001=>3
111110010=>2
111110011=>2
111110100=>3
111110101=>2
111110110=>1
111110111=>1
111111000=>3
111111001=>2
111111010=>2
111111011=>1
111111100=>2
111111101=>1
111111110=>1
111111111=>0
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Description
Half the length of a longest factor which is its own reverse-complement and begins with a one of a binary word.
Code
def statistic(w): return max([(l+1)//2 for a in range(len(w)) for l in range(len(w)-a) if w[a] == 1 and all(w[a+i] == 1-w[a+l-i] for i in range(l))] + [0])
Created
Jun 12, 2019 at 08:58 by Martin Rubey
Updated
Jun 12, 2019 at 08:58 by Martin Rubey
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