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A305648
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Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
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1
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21, 289, 430, 13498, 304707, 7215825, 283691091, 10435409852, 345636487600, 12593852870880, 464418610630494, 16562715976926678, 599066844914471815, 21849132612659676089, 790837634816109991358, 28651101585036924255936
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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..0..1..1..1..0. .0..1..1..1..0..0..0. .0..1..1..0..1..1..0
..0..0..1..0..0..0..0. .0..0..1..1..1..0..0. .0..0..1..0..1..0..0
..1..1..1..0..0..1..1. .1..1..0..0..0..0..0. .0..0..0..1..0..1..1
..0..0..0..1..0..1..0. .0..0..1..1..1..0..1. .1..0..1..0..0..0..0
..0..1..0..1..0..0..0. .0..1..0..0..1..0..0. .0..0..1..1..0..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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