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A316277
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Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
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1
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1, 25, 125, 846, 5321, 34017, 216805, 1382759, 8818011, 56235794, 358634504, 2287139522, 14585896741, 93019435778, 593217934737, 3783161234432, 24126561478176, 153863643025597, 981243045206416, 6257735063392694
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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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FORMULA
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Empirical: a(n) = 4*a(n-1) +16*a(n-2) +5*a(n-3) -50*a(n-4) -91*a(n-5) -64*a(n-6) -37*a(n-7) -23*a(n-8) -5*a(n-9) for n>10
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EXAMPLE
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Some solutions for n=5
..0..0..0. .0..1..1. .0..0..1. .0..0..1. .0..1..1. .0..1..1. .0..0..1
..0..1..1. .0..0..1. .0..1..0. .1..1..1. .1..0..0. .0..0..1. .0..1..1
..0..1..1. .1..0..1. .1..1..1. .0..0..0. .0..0..1. .0..0..1. .0..1..1
..1..1..0. .1..0..0. .1..1..1. .0..0..1. .0..0..0. .0..1..0. .0..1..0
..1..0..0. .0..0..1. .0..0..1. .1..0..1. .1..1..0. .1..1..0. .0..1..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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