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A318044
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Number of nX7 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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1, 46, 1648, 42793, 1304057, 37826270, 1097286743, 32035215365, 933917327711, 27217103197673, 793339183054443, 23124520193958899, 674035058682860528, 19646860749850864344, 572669260893508995369, 16692235797793244881719
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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..0..1..0..0..0..1. .0..0..0..1..1..1..0. .0..0..0..1..1..0..0
..0..1..0..1..1..0..1. .0..0..1..0..0..1..1. .0..0..1..0..1..1..1
..1..0..1..1..0..0..0. .0..1..0..1..0..0..0. .0..1..0..0..0..0..1
..0..1..0..0..0..1..1. .1..0..1..1..1..0..1. .1..1..1..0..0..1..0
..0..1..0..1..0..1..0. .1..0..0..1..0..1..1. .0..1..0..1..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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