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A299062
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Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
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1
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1, 18, 141, 993, 7330, 54106, 398654, 2937795, 21650600, 159556133, 1175862733, 8665626722, 63862119016, 470637646700, 3468406597875, 25560735353400, 188372145331363, 1388225520347031, 10230653220855076, 75395721942360742
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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) = 6*a(n-1) +8*a(n-2) +14*a(n-3) +11*a(n-4) -4*a(n-5) +3*a(n-6) +2*a(n-7) -5*a(n-8) -2*a(n-9) for n>10
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EXAMPLE
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Some solutions for n=5
..0..1..0. .0..1..1. .0..1..0. .0..1..1. .0..0..0. .0..0..0. .0..1..1
..1..0..1. .0..1..0. .0..0..1. .0..1..0. .0..1..0. .1..1..0. .0..0..1
..0..1..1. .0..1..0. .0..1..0. .0..0..0. .0..1..1. .0..0..1. .1..1..1
..1..1..0. .1..0..1. .0..1..0. .1..0..1. .1..0..1. .0..1..0. .0..1..0
..1..0..1. .1..0..0. .0..0..0. .0..1..1. .0..1..1. .0..1..0. .1..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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