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A303635
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Number of nX7 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
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1
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0, 8, 2, 47, 207, 1417, 7538, 53989, 309136, 2041378, 12561807, 80107485, 503096639, 3184635107, 20059337678, 126810474201, 799559544897, 5050657497454, 31866050738166, 201192109912331, 1269778066786642, 8015596643008521
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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..1..0..1..0..1. .0..1..1..0..1..1..0. .0..1..0..1..0..1..0
..1..0..0..1..0..1..0. .1..0..0..1..0..0..1. .1..0..0..1..0..0..1
..1..0..0..1..0..1..1. .0..1..0..1..0..0..1. .0..1..1..0..1..1..0
..0..1..1..0..1..0..0. .0..1..0..0..1..1..0. .0..1..1..0..1..1..0
..1..0..1..0..1..0..1. .1..0..1..0..1..0..1. .1..0..0..1..0..0..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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