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A304260
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Number of nX5 0..1 arrays with every element unequal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
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1
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0, 18, 17, 47, 116, 230, 772, 1832, 5500, 15852, 43779, 127396, 365026, 1043534, 2996686, 8607783, 24658257, 70781079, 203294560, 583065421, 1673869969, 4805473675, 13792054243, 39590426728, 113650893401, 326237378540
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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..1..0. .0..1..0..0..1. .0..0..0..0..0. .0..1..0..0..1
..1..0..1..0..1. .1..1..1..0..1. .1..1..0..1..1. .1..1..0..0..1
..1..0..0..0..1. .0..1..1..1..0. .1..0..1..0..1. .1..0..0..1..0
..1..0..1..0..1. .1..1..0..0..0. .0..0..1..0..0. .0..1..1..1..0
..0..1..1..1..0. .0..1..1..1..1. .1..1..0..1..1. .0..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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