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A278279
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Number of nX7 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.
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1
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0, 317, 20736, 1870365, 157609938, 13538466880, 1158266740087, 99182079495633, 8491049196878995, 726961954823301592, 62238120572972036597, 5328470518831632979210, 456192709882426407920004
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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=3
..0..0..0..1..1..0..0. .0..1..1..1..0..1..0. .0..1..1..1..0..1..1
..1..1..0..1..0..0..1. .0..1..0..1..0..1..0. .0..1..0..0..0..1..0
..1..0..1..0..0..1..1. .0..1..0..1..1..1..0. .0..1..0..1..1..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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