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A326100
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Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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4, 29, 161, 929, 5383, 31236, 181227, 1051456, 6100399, 35393679, 205349281, 1191408438, 6912388772, 40104734047, 232682180647, 1349990181408, 7832458355125, 45442851903417, 263653210203742, 1529679858088141
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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) = 5*a(n-1) +5*a(n-2) -2*a(n-3) -3*a(n-6) -2*a(n-7) -a(n-8) -a(n-9)
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EXAMPLE
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Some solutions for n=5
..0..0..0. .0..1..0. .0..1..0. .0..0..1. .0..1..1. .0..0..1. .0..1..1
..0..1..1. .0..1..0. .1..0..0. .0..0..0. .0..1..0. .0..1..1. .1..0..1
..0..0..0. .1..0..0. .1..1..1. .1..1..1. .0..1..0. .1..0..0. .0..1..0
..0..1..0. .1..1..0. .1..0..1. .1..0..1. .0..0..1. .1..1..0. .1..0..0
..0..1..0. .1..1..0. .0..1..1. .1..1..1. .0..1..1. .1..1..0. .1..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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