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A227164
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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 one or less, with rows and columns of the latter in lexicographically nondecreasing order
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1
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6, 66, 558, 4528, 37012, 283430, 2010569, 13174529, 79606861, 445291143, 2319506105, 11318251449, 52022806997, 226357815317, 936451009248, 3697654793472, 13982230433991, 50782778554993, 177615062917012
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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
..0..0..0..0..0....1..0..0..0..0....1..0..0..0..0....1..0..0..0..0
..0..0..0..0..0....0..0..0..0..1....0..1..1..0..0....0..0..1..0..0
..0..1..1..1..0....0..1..0..0..0....0..1..0..0..1....0..1..0..0..0
..0..0..0..0..1....0..1..0..0..1....0..1..0..1..0....0..0..0..1..0
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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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