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A302380
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Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
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1
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8, 2208, 127535, 8334338, 535192095, 34271733937, 2195619257236, 140685735128595, 9013655138528774, 577518643711241385, 37002236612561808562, 2370775298902153257752, 151898260084738496346512
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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..1..1..0..0..0. .0..0..1..1..1..0..0. .0..0..1..0..1..1..1
..0..1..0..0..1..0..0. .0..1..0..1..1..0..0. .0..1..0..0..0..0..0
..0..1..0..0..1..0..0. .0..1..0..0..0..0..0. .0..1..0..0..1..1..1
..1..0..0..1..0..0..0. .1..0..0..1..1..0..0. .1..0..0..1..1..0..0
..0..0..1..1..1..1..0. .0..0..1..1..0..1..1. .0..0..1..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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