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A318090
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Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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1, 23, 15, 1976, 8525, 68301, 504606, 4057433, 31285292, 240249513, 1835199684, 14224588572, 109059566554, 843075304556, 6476620099640, 49958130687711, 384425885605155, 2962333140940211, 22808849182759504, 175696908902774160
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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. .0..1..0..1..1..0..0. .0..1..1..0..0..1..1
..1..0..0..1..1..1..1. .1..0..0..0..0..1..1. .1..0..1..1..0..1..1
..0..0..0..0..0..0..0. .0..0..1..0..1..1..0. .1..0..1..1..1..0..0
..1..1..0..0..0..0..1. .1..1..0..0..1..0..0. .1..1..0..1..1..1..0
..0..0..1..1..1..1..0. .1..1..0..1..0..0..0. .0..1..0..1..0..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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