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A299584
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Number of nX4 0..1 arrays with every element equal to 1, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
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1
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1, 16, 8, 84, 229, 720, 4326, 15638, 62867, 299505, 1292124, 5301037, 23788861, 105382810, 445139633, 1954124848, 8627099683, 37128694429, 161785978010, 710198752914, 3082692941493, 13413874059673, 58661578434695
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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 64 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..0
..0..0..0..0. .1..1..1..1. .0..0..0..0. .0..0..0..0. .0..0..0..0
..1..1..1..1. .1..1..1..1. .0..0..1..0. .0..1..0..0. .0..0..0..0
..1..1..0..0. .1..1..1..1. .0..0..0..1. .1..0..0..0. .0..0..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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