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A300942
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Number of nX6 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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13, 6, 47, 186, 836, 3873, 16587, 77438, 373184, 1821648, 8941824, 44058575, 218133889, 1083495226, 5395009930, 26905649476, 134280333749, 670528898740, 3349651614840, 16737836364340, 83651967346499, 418123829380174
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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..1..0..1..1. .0..0..0..1..0..1. .0..0..1..1..1..0. .0..1..0..1..1..1
..1..1..1..0..0..0. .1..0..0..1..0..0. .1..1..1..1..1..0. .0..1..0..0..1..1
..1..1..0..0..0..0. .1..0..1..1..0..0. .0..1..1..1..0..0. .1..1..0..0..1..1
..1..0..0..0..0..1. .0..1..1..1..0..1. .0..1..1..0..0..0. .1..1..0..0..1..1
..1..0..0..0..1..0. .1..0..0..1..0..1. .1..0..1..0..0..1. .0..1..0..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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