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A301955
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Number of 6Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
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1
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0, 89, 1411, 56710, 1608681, 58609226, 1969215107, 67333850084, 2287773842566, 77959998302605, 2653916633152707, 90371628086108933, 3077076307444521060, 104774663297551634379, 3567555401986729558326, 121474804497455764013977
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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..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..1..0..0..0. .0..0..0..1..1. .0..1..0..0..0. .0..1..0..1..1
..1..1..1..0..1. .1..1..1..1..1. .1..1..1..1..0. .1..0..0..0..1
..1..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0. .1..1..1..1..1
..0..1..0..1..1. .1..1..0..1..0. .1..1..1..1..0. .0..0..0..1..0
..0..0..0..1..1. .1..0..0..0..0. .1..1..1..0..0. .1..1..0..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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