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A299124
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Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
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1
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5, 16, 23, 232, 623, 3368, 20226, 95305, 517446, 2849177, 14996918, 80878846, 438307578, 2350137185, 12666447836, 68352017686, 367891360100, 1982533944388, 10686608415147, 57568972855703, 310217349581539, 1671740619224755
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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 66 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..0..0..0. .0..1..0..0. .0..0..1..0. .0..0..1..0. .0..1..0..0
..0..0..1..1. .1..0..0..0. .0..0..1..0. .0..0..0..1. .0..1..0..0
..0..0..0..0. .1..1..1..1. .0..1..1..1. .1..1..0..0. .1..1..0..0
..1..1..1..1. .1..1..0..0. .0..0..1..1. .1..1..0..0. .0..1..0..0
..1..1..1..1. .1..1..1..1. .0..0..0..0. .0..0..0..1. .0..1..0..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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