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A297882
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Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 king-move adjacent elements, with upper left element zero.
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0
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1, 7, 20, 36, 114, 253, 433, 734, 1037, 1882, 2897, 4474, 4556, 9490, 7864, 13478, 31282, 20470, 123291, 55794, 102050, 328168, 112445
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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=7
..0..1..0..1..1..0..1. .0..1..0..0..0..1..1. .0..0..1..0..1..1..0
..0..0..1..1..1..1..1. .1..0..1..1..1..0..0. .1..1..1..0..0..0..1
..1..1..0..0..0..0..0. .1..0..0..0..0..0..1. .0..1..0..1..0..1..0
..0..1..1..1..1..1..1. .0..0..1..1..1..0..1. .0..1..0..1..0..1..0
..0..1..0..0..0..0..0. .1..1..0..0..0..0..1. .0..1..0..1..0..1..0
..1..0..1..1..1..1..1. .0..1..1..1..1..0..0. .1..1..1..0..0..0..1
..0..1..0..1..1..0..1. .0..1..0..0..0..1..1. .0..0..1..0..1..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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