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A232415
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Number of (1+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, diagonal or antidiagonal neighbor
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1
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15, 159, 973, 6477, 46713, 334521, 2375879, 16872055, 119936863, 852644471, 6060859773, 43081768317, 306237423553, 2176828198993, 15473532443783, 109990357259447, 781843471181927, 5557571249357231, 39504835607986701
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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) = 6*a(n-1) +2*a(n-2) +32*a(n-3) +69*a(n-4) +2*a(n-5) +24*a(n-6) -56*a(n-7) -160*a(n-8) +32*a(n-9) +64*a(n-10)
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EXAMPLE
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Some solutions for n=6
..0..2..0..1..0..2..2....0..0..1..1..0..2..0....0..2..0..0..0..2..2
..1..0..2..0..2..0..2....1..1..1..1..2..0..0....2..0..1..1..0..1..2
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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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