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A227124
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Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order
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1
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6, 40, 202, 1079, 5820, 30620, 153955, 732611, 3296920, 14061299, 56985160, 220076717, 812449972, 2875724911, 9787354849, 32113565709, 101824379739, 312674532585, 931663492446, 2698483534259, 7609773537119, 20924215257349
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical polynomial of degree 39 (see link above)
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EXAMPLE
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Some solutions for n=4
..1..1..1..1..0....1..0..0..0..0....1..1..0..0..0....0..0..0..0..0
..1..1..1..1..0....1..0..0..0..1....1..0..0..0..0....0..1..1..1..1
..1..0..0..0..0....1..0..0..0..0....1..0..0..1..1....0..1..1..1..1
..0..0..0..0..0....0..0..0..0..0....1..0..0..0..0....0..1..1..1..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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