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A303968
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Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 5 king-move adjacent elements, with upper left element zero.
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1
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21, 237, 186, 842, 2247, 6264, 15517, 40239, 101894, 275913, 742329, 1970215, 5207495, 13783510, 36338058, 96289588, 255453841, 676717260, 1792458697, 4748791014, 12573506308, 33301968773, 88224464420, 233692020122
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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..1..0..0..0..0. .0..1..1..1..1..1..1. .0..0..0..1..0..0..0
..0..0..0..0..0..0..1. .1..1..1..1..1..1..1. .0..0..0..0..0..0..0
..0..0..0..0..0..1..1. .1..1..1..1..1..1..1. .0..0..0..0..0..0..1
..0..0..0..0..1..1..1. .0..1..1..1..1..1..1. .1..0..0..0..0..0..0
..0..0..0..1..1..1..1. .1..1..1..1..1..0..1. .0..0..0..0..0..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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