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A300545
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Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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8, 1568, 117146, 8514930, 632777378, 47042626155, 3494400946777, 259582877324570, 19283328543117575, 1432478084282766997, 106412759390199221479, 7904956066250728907461, 587225918180407015680952
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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..0..0..0..1..1..0. .0..0..0..0..0..1..1. .0..0..0..0..1..1..0
..0..0..1..0..0..1..0. .0..0..1..0..1..0..0. .0..0..1..0..0..0..1
..0..1..0..0..1..0..1. .0..1..0..0..1..0..0. .0..1..0..0..0..1..1
..0..0..0..1..1..1..1. .0..0..1..1..1..0..1. .0..0..1..1..1..0..1
..0..1..1..0..0..0..0. .0..0..0..0..1..1..1. .0..0..1..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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