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A317862
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Number of nX7 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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8, 102, 164, 851, 2616, 9045, 33238, 116271, 405766, 1489264, 5416535, 20000458, 73575709, 273375552, 1015670766, 3790505262, 14158662304, 52983894317, 198495708632, 744119241519, 2791930147584, 10479343979306, 39350143779387
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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..1..1..0..0..1..0. .0..0..1..0..0..1..0. .0..1..1..0..1..0..0
..1..1..1..0..0..0..0. .1..0..0..0..1..1..0. .1..1..1..1..1..0..1
..1..0..0..1..0..1..0. .0..0..0..0..0..0..1. .0..1..1..1..1..1..1
..0..1..1..1..1..1..0. .0..1..1..0..0..0..0. .1..0..0..1..1..1..0
..0..1..1..0..1..1..0. .0..1..0..0..1..0..1. .1..0..1..1..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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