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A250835
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Number of (n+1)X(2+1) 0..2 arrays with no 2X2 subblock having a diagonal absolute difference less than its antidiagonal absolute difference
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1
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333, 4131, 51105, 633207, 7847629, 97259475, 1205380713, 14938857383, 185144548997, 2294587257555, 28437947447217, 352445463031871, 4368029914208605, 54135142508612971, 670923440009528025
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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) = 22*a(n-1) -157*a(n-2) +558*a(n-3) -1206*a(n-4) +1488*a(n-5) -112*a(n-6) -2242*a(n-7) +2090*a(n-8) -392*a(n-9) -32*a(n-10)
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EXAMPLE
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Some solutions for n=3
..0..0..2....1..2..1....1..2..2....2..0..1....1..2..0....2..2..2....1..1..1
..0..2..0....2..0..1....2..0..0....0..1..2....1..0..1....2..1..0....1..0..0
..1..1..0....1..1..0....0..1..1....2..2..0....0..2..2....0..1..0....0..0..2
..2..0..1....0..0..2....0..1..2....2..2..0....2..0..0....1..1..2....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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