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A299004
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Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.
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1
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8, 88, 372, 1977, 11553, 63472, 350339, 1960512, 10931666, 60915771, 339863732, 1896117726, 10577509015, 59011882438, 329233976176, 1836824343961, 10247854122236, 57174149141128, 318982362376709, 1779646767539938
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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 65 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..1..0..1. .0..0..1..0. .0..0..0..1. .0..0..0..0. .0..1..1..1
..0..1..1..1. .0..1..0..0. .1..1..0..0. .1..1..0..1. .1..0..0..1
..0..0..0..1. .0..1..1..1. .1..0..0..1. .0..0..0..1. .0..1..1..0
..0..1..0..1. .0..0..0..0. .0..0..0..0. .1..1..1..0. .1..0..0..1
..1..1..1..0. .1..1..1..1. .0..1..1..0. .0..1..0..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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