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A304354
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Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.
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1
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21, 289, 280, 4370, 34887, 445745, 9176798, 160397426, 2593742186, 49371354839, 908899582912, 16074992228393, 295578528424499, 5422250103851024, 98300554690294042, 1794609057854976519, 32811799818799674273
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OFFSET
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1,1
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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..0..1..0..1..1. .0..0..1..0..1..0..1. .0..1..0..1..0..1..0
..0..0..1..1..0..1..0. .1..0..1..1..0..1..1. .1..1..0..0..1..0..0
..1..1..1..0..0..1..0. .0..0..1..0..0..1..1. .0..0..1..1..1..0..0
..1..0..0..1..1..0..1. .0..0..1..1..0..1..1. .0..1..0..1..1..0..0
..0..0..0..0..1..0..0. .0..1..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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