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A297990
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Number of nX5 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
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1
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3, 166, 424, 1446, 5100, 18189, 62390, 213997, 735000, 2520806, 8673171, 29895212, 103062319, 355448168, 1226378689, 4232831248, 14614818621, 50474934066, 174362780682, 602441004444, 2081828199132, 7195055390173, 24869853343749
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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 99 (see link above)
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EXAMPLE
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Some solutions for n=7
..0..1..1..0..0. .0..0..1..0..0. .0..1..1..1..0. .0..0..1..0..0
..0..1..0..1..1. .1..1..1..1..1. .1..0..0..0..1. .1..0..1..0..1
..0..1..0..1..0. .0..0..0..0..0. .1..1..1..1..0. .1..1..1..0..1
..0..1..0..1..0. .0..1..1..1..0. .0..0..0..0..1. .1..0..1..0..1
..1..0..1..0..1. .1..0..0..0..1. .0..1..1..1..0. .1..0..1..0..1
..1..0..1..0..1. .0..1..1..0..1. .1..0..0..0..1. .1..0..1..0..1
..0..0..1..1..0. .0..0..0..1..1. .0..1..1..0..1. .1..1..0..0..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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