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A298542
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Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.
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1
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1, 17, 109, 588, 3276, 18500, 104034, 585134, 3291766, 18516878, 104162234, 585942186, 3296084046, 18541374458, 104300314322, 586717825798, 3300448449034, 18565926430146, 104438420710534, 587494718619882
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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) = 5*a(n-1) +3*a(n-2) +6*a(n-3) -15*a(n-4) -11*a(n-5) -5*a(n-6) -46*a(n-7) -2*a(n-8) -38*a(n-9) -16*a(n-10) -8*a(n-11) -8*a(n-12) for n>13
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EXAMPLE
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Some solutions for n=7
..0..0..1. .0..0..1. .0..0..1. .0..0..0. .0..0..1. .0..1..1. .0..1..1
..0..1..0. .0..1..0. .0..0..1. .1..0..1. .0..1..0. .0..1..0. .1..0..0
..1..0..1. .0..0..0. .1..0..1. .1..1..1. .0..0..0. .0..0..0. .1..0..1
..1..1..1. .0..0..0. .1..1..1. .1..1..1. .0..0..0. .0..0..0. .1..1..1
..1..1..1. .0..1..0. .1..1..1. .1..0..1. .0..1..0. .0..1..0. .1..1..1
..1..0..1. .1..0..0. .1..0..1. .1..0..1. .0..1..1. .1..1..0. .1..0..1
..0..1..0. .0..1..1. .1..0..1. .0..1..0. .0..1..1. .1..0..1. .1..1..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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