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A300638
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Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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8, 223, 705, 3313, 17607, 124439, 865205, 6105466, 44264248, 319622847, 2311191759, 16797467849, 122107007666, 887949403002, 6461637480954, 47018596903063, 342127968993605, 2489544665981657, 18115122148301327
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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..1..1..1..0..0..0. .0..0..0..1..1..1..1. .0..0..1..0..0..1..0
..0..0..0..1..0..0..1. .0..0..1..0..0..0..1. .1..0..1..0..1..0..0
..1..1..0..0..0..1..0. .0..1..0..1..1..0..1. .1..0..0..0..0..0..0
..1..0..0..1..0..1..0. .1..0..1..0..1..0..1. .0..0..0..0..1..0..0
..0..0..0..1..0..1..0. .1..0..1..0..1..0..0. .1..1..0..1..0..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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