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A251217
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Number of (n+1)X(6+1) 0..1 arrays with no 2X2 subblock having zero or two 1s
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1
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631, 5569, 50912, 502971, 4907873, 48781920, 482274751, 4791965557, 47523048960, 471984045011, 4684560331885, 46516009269268, 461786651683295, 4585017470092103, 45520667522670878, 451955910904080413
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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 recurrence of order 62 (see link above)
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EXAMPLE
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Some solutions for n=3
..0..1..0..1..0..1..1....0..1..1..0..1..1..1....1..0..1..1..1..1..0
..1..1..1..1..1..1..1....1..1..1..1..1..1..1....1..1..1..0..1..1..1
..1..0..1..1..1..1..0....1..1..0..1..1..0..1....0..1..1..1..1..1..0
..1..1..1..1..1..0..0....1..0..0..0..1..1..1....1..1..1..0..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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