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A300687
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Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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5, 307, 7187, 150558, 3179333, 67479838, 1431755828, 30366081812, 643942334598, 13656056835393, 289603801565185, 6141624884160687, 130245342969245790, 2762110283944810229, 58576019807838267185, 1242220527820363713104
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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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EXAMPLE
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Some solutions for n=5
..0..0..0..1..0..1. .0..0..0..0..1..1. .0..0..0..0..1..0. .0..0..0..0..1..0
..0..1..1..0..0..1. .0..1..0..1..0..1. .0..1..0..1..0..1. .0..1..0..1..0..0
..0..0..1..1..0..0. .0..1..1..1..0..1. .0..1..1..0..1..0. .0..1..0..1..0..1
..0..1..0..1..0..0. .0..0..0..1..0..0. .0..0..1..1..1..0. .0..1..0..0..1..0
..1..0..0..1..1..1. .1..1..0..1..0..0. .1..1..0..0..1..0. .1..0..1..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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