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A304957
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Number of nX6 0..1 arrays with every element unequal to 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
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1
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5, 333, 1203, 8361, 60568, 435964, 3174054, 23304518, 170481467, 1248838598, 9167230233, 67263160245, 493257323135, 3619388695936, 26558238094660, 194837640252464, 1429535459938593, 10488919190348149, 76956245346728962
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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..1..0. .0..0..0..1..0..1. .0..0..1..1..1..0. .0..0..0..1..0..1
..1..1..0..1..1..0. .0..1..0..0..0..1. .0..1..1..0..1..1. .1..1..0..0..0..0
..1..0..1..1..1..0. .1..1..1..1..0..1. .1..0..0..0..0..0. .1..0..1..0..0..0
..0..0..1..1..0..1. .0..1..1..0..1..1. .1..0..1..0..0..1. .1..0..0..0..0..1
..1..0..1..1..1..1. .0..0..1..0..0..0. .1..1..0..0..0..0. .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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