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A317901
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Number of nX7 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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0, 22, 6, 116, 315, 502, 3630, 7770, 34645, 86317, 320622, 966922, 3306875, 10609266, 34934092, 114138685, 374143779, 1227335831, 4020363887, 13193058120, 43248448731, 141915161267, 465495771858, 1527373960376, 5011467375946
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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 n=5
..0..1..0..1..1..0..1. .0..1..1..1..1..1..0. .0..1..0..1..1..0..1
..1..0..0..0..0..0..0. .1..0..0..0..0..0..1. .1..0..0..0..0..0..0
..0..1..0..1..0..1..0. .0..0..1..0..1..0..1. .1..0..1..0..1..0..1
..0..0..0..0..0..0..1. .1..0..0..0..0..0..0. .0..0..0..0..0..0..1
..1..0..1..1..0..1..0. .1..0..1..1..1..0..1. .1..0..1..1..0..1..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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