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A295274
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Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s.
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2
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81, 2570, 99245, 3697742, 139221499, 5221177246, 196091375073, 7361533108317, 276386201580189, 10376697508977992, 389585088134351369, 14626667590533685932, 549146940474831592906, 20617295057949494189434
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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=3
..0..1..0..0..0..0..1....0..0..1..0..0..0..0....0..0..1..0..1..0..1
..0..0..1..0..0..0..0....0..0..1..0..1..0..1....0..1..0..1..1..1..0
..0..0..0..0..1..1..0....1..1..0..0..0..0..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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