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A298453
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Number of nX7 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
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1
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0, 240, 204, 15248, 206239, 4095727, 112275165, 2871621220, 62756244756, 1680472622565, 43197208627165, 1038517293951991, 26665044675200600, 682574655104085964, 16923243467936517267, 429230559842341481820
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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=4
..0..0..1..1..1..1..1. .0..0..0..0..0..1..1. .0..0..0..0..0..0..0
..1..1..1..1..1..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0
..1..1..0..0..1..1..1. .1..1..0..1..1..0..0. .0..1..1..1..1..0..1
..1..1..0..0..1..1..1. .1..1..0..1..1..1..1. .1..0..1..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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