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A301394
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Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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0
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0, 1, 3, 78, 4857, 885003, 528025038, 956047339302, 5338842851150762, 91544753173766016191, 4821728266187979354515714
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OFFSET
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1,3
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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..1..0. .0..0..0..0..0. .0..0..0..0..1. .0..0..0..1..1
..0..1..1..0..0. .0..0..1..0..0. .0..0..0..1..1. .0..0..1..1..1
..0..1..1..0..1. .0..1..1..0..1. .0..0..0..1..1. .1..1..0..1..1
..0..0..1..1..1. .0..0..0..1..1. .0..1..0..0..0. .1..0..0..1..1
..0..0..1..1..1. .0..0..1..1..1. .1..1..0..0..0. .1..1..1..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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