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A300263
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Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
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1
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8, 88, 375, 2030, 12324, 71529, 412094, 2398145, 13965762, 81253079, 472851402, 2752482575, 16022640154, 93271665191, 542972865898, 3160919044027, 18401442719156, 107125485995213, 623642100886430, 3630605618341821
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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 64 (see link above)
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EXAMPLE
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Some solutions for n=5
..0..0..1..1. .0..0..1..0. .0..1..1..1. .0..1..1..1. .0..0..1..1
..1..1..0..1. .1..0..0..1. .1..1..0..0. .1..0..0..1. .0..1..0..0
..0..0..1..0. .0..0..0..0. .0..0..0..1. .0..0..0..1. .0..1..0..1
..1..0..1..0. .1..0..1..0. .0..1..0..0. .1..0..1..0. .0..0..1..1
..0..1..1..0. .0..0..0..1. .0..1..1..1. .0..0..1..1. .1..1..1..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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