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A298059
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Number of nX4 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.
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1
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1, 13, 2, 11, 32, 42, 104, 269, 523, 1761, 4271, 9950, 33236, 84720, 210683, 665446, 1772832, 4540852, 13723354, 37563820, 98003395, 287421335, 798136234, 2112310069, 6070832044, 16971983943, 45446410743, 128849163703, 361098610655
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OFFSET
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1,2
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COMMENTS
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LINKS
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FORMULA
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Empirical recurrence of order 71 (see link above)
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EXAMPLE
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Some solutions for n=7
..0..0..1..1. .0..0..1..1. .0..1..1..0. .0..1..0..0. .0..0..1..1
..1..1..1..1. .1..1..1..1. .0..1..1..0. .0..1..0..0. .1..1..1..1
..0..0..0..0. .0..0..0..0. .0..0..0..0. .1..1..0..1. .1..1..1..0
..1..1..0..0. .1..1..0..0. .0..1..1..0. .1..1..0..1. .0..1..0..1
..1..1..1..1. .1..1..1..1. .0..0..0..0. .0..0..0..0. .0..1..0..0
..0..0..0..0. .0..0..0..0. .0..1..1..0. .1..1..0..1. .1..1..0..1
..1..1..0..0. .0..0..1..1. .0..1..1..0. .1..1..1..0. .1..1..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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