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A269765
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Number of nX6 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once.
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1
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18750, 368958240, 4022791852800, 36821411380183680, 309460647800786666280, 2472167532788732096214720, 19095466730438184387582710640, 144001677387908129355684560596560, 1066612311213048839948713538763169320
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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 26 (see link above)
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EXAMPLE
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Some solutions for n=1
..4..0..0..2..3..0. .4..0..1..4..2..4. .1..1..1..3..4..1. .3..5..4..4..0..5
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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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