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A303634
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Number of nX6 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, 5, 3, 22, 66, 394, 1417, 7706, 33066, 162051, 742361, 3551493, 16462120, 78105973, 365231748, 1722636470, 8082828137, 38044302672, 178718778290, 840640740209, 3950836581073, 18577968343323, 87329775332631, 410598309192529
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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..0..1. .0..1..1..0..1..0. .0..1..0..1..0..1. .0..1..0..1..0..1
..1..0..0..1..1..0. .1..0..0..1..0..1. .1..0..0..1..1..0. .1..0..1..1..0..0
..0..1..0..1..0..1. .0..1..1..1..0..0. .0..1..1..0..0..1. .1..0..1..0..1..1
..0..1..1..0..0..1. .0..1..0..0..1..1. .1..0..0..1..1..0. .0..1..1..0..1..0
..1..0..0..1..1..0. .1..0..1..0..1..0. .0..1..0..1..0..1. .1..0..0..1..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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