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A269079
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Number of 5Xn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.
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1
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32, 244, 2343, 20400, 165607, 1383105, 10778640, 86308622, 661641931, 5146079168, 39031235709, 297777942033, 2239241624640, 16861326990168, 125878250277823, 939067269600080, 6967653661432115, 51619835791134129, 381021973991495280
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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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FORMULA
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Empirical: a(n) = 8*a(n-1) +52*a(n-2) -424*a(n-3) -816*a(n-4) +6756*a(n-5) +1362*a(n-6) -38476*a(n-7) +19016*a(n-8) +82920*a(n-9) -70008*a(n-10) -50556*a(n-11) +50607*a(n-12) +9180*a(n-13) -10404*a(n-14)
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EXAMPLE
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Some solutions for n=4
..0..0..0..0. .1..0..1..0. .0..0..0..1. .0..0..0..1. .0..0..0..1
..0..0..0..1. .0..0..1..0. .1..0..0..0. .0..1..0..1. .0..0..1..0
..0..1..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..1. .0..0..0..0
..0..1..0..0. .0..0..0..0. .1..0..0..0. .0..1..0..1. .0..0..0..0
..0..0..0..1. .0..1..1..0. .1..0..1..0. .0..1..0..1. .1..0..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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