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A183455
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Number of n X 8 binary arrays with every 1 having exactly three king-move neighbors equal to 1.
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1
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1, 19, 63, 139, 723, 3005, 9511, 36995, 150145, 547767, 2049243, 8099185, 31232375, 118794973, 475013103, 1906016687, 7508667425, 31409068325, 132833355231, 551489805231, 2461668875187, 11088714849657, 48962978982683
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for 5 X 8
..1..1..0..0..0..0..0..0....0..0..0..0..0..0..1..1....0..1..1..0..0..0..1..1
..1..1..0..1..1..0..0..0....0..0..0..0..0..0..1..1....0..1..1..0..0..0..1..1
..0..0..0..1..1..0..0..0....0..1..1..0..0..0..0..0....0..0..0..0..0..0..0..0
..1..1..0..0..0..0..1..1....0..1..1..0..0..1..1..0....0..0..1..1..0..0..1..1
..1..1..0..0..0..0..1..1....0..0..0..0..0..1..1..0....0..0..1..1..0..0..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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