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A296629
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Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0, 2 or 4 neighboring 1's.
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0
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2, 8, 71, 1444, 67488, 7121315, 1700240351, 918770773688, 1123781080551251, 3111403698927107015, 19501463789775958005296, 276719237565795526825364758
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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
..1..0..0..1..1. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..0..0
..0..1..1..0..1. .1..1..0..1..0. .0..1..0..0..0. .0..0..0..0..1
..1..0..0..1..0. .1..0..0..0..1. .1..1..0..1..0. .0..0..0..0..0
..1..0..0..1..0. .0..0..0..0..0. .0..0..1..1..0. .1..0..0..0..0
..1..1..1..0..0. .1..0..0..0..1. .0..1..1..1..0. .0..0..1..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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