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A296311
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Number of nX6 0..1 arrays with each 1 adjacent to 3 or 6 king-move neighboring 1s.
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1
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1, 9, 23, 45, 162, 479, 1198, 3534, 10374, 28464, 80600, 233023, 663259, 1871905, 5398412, 15702374, 44643584, 130054976, 387536847, 1118773498, 3332947080, 10271834711, 30432525534, 93816278500, 301779073626, 927540514785
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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..0..0..0..0..0. .0..1..1..0..0..0. .0..0..0..0..0..0. .0..0..0..1..1..0
..0..0..1..0..0..0. .0..1..1..0..1..1. .1..1..0..0..0..0. .0..0..0..1..1..0
..1..1..1..1..1..0. .0..0..0..0..1..1. .1..1..0..0..1..1. .0..0..0..0..0..0
..1..1..1..1..1..0. .0..0..0..0..0..0. .0..0..0..0..1..1. .0..1..1..0..0..0
..0..0..1..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..1..1..0..0..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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