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A304261
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Number of nX6 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
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1
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0, 33, 26, 88, 230, 925, 2516, 8248, 27317, 89074, 287896, 945232, 3089403, 10093067, 33056134, 108135876, 354125720, 1159096064, 3795435852, 12426659094, 40688258392, 133217543175, 436196336127, 1428218527996, 4676315545330
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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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EXAMPLE
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Some solutions for n=5
..0..1..0..0..1..0. .0..1..1..0..0..1. .0..0..1..1..1..0. .0..0..1..1..1..1
..1..1..0..1..1..1. .0..1..1..0..0..1. .1..1..0..0..0..1. .1..1..0..1..0..0
..0..0..1..1..1..0. .0..1..1..0..0..1. .1..1..1..0..1..1. .0..1..0..0..0..1
..0..1..1..1..0..0. .0..0..0..0..1..0. .0..0..1..0..0..1. .0..0..1..1..0..0
..0..1..0..1..0..1. .1..1..1..1..1..0. .1..0..0..1..1..0. .1..0..0..1..1..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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