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A296328
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Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1's.
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0
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2, 8, 64, 1235, 50595, 4476519, 869077778, 366077961514, 335596576750584, 669918796268237474, 2910017609941646409850, 27515650943860323389048352, 566341048893984999950037393720, 25373839553082331349391351332105201
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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..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .1..0..0..0..1
..0..0..0..0..1. .1..1..0..1..1. .1..1..0..1..0. .0..0..0..0..0
..1..1..0..0..0. .1..0..0..1..0. .1..0..0..0..0. .1..0..0..0..0
..1..0..1..0..1. .0..1..0..0..0. .0..1..0..1..0. .0..1..1..0..1
..0..1..1..0..0. .1..1..0..0..1. .0..0..1..1..0. .0..1..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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