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A232586
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Number of (n+1)X(5+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal
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1
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20, 108, 606, 3002, 14398, 66950, 306022, 1382638, 6200520, 27671244, 123093664, 546418140, 2422183000, 10727201704, 47478696368, 210055317910, 929074602120, 4108554199540, 18166666165648, 80320554722730, 355103563888676
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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) = 9*a(n-1) -22*a(n-2) -8*a(n-3) +89*a(n-4) -75*a(n-5) -75*a(n-6) +136*a(n-7) -21*a(n-8) -51*a(n-9) +2*a(n-10) +24*a(n-11) -3*a(n-13) -a(n-14)
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EXAMPLE
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Some solutions for n=5
..2..1..0..2..1..0....2..1..0..1..2..1....0..1..2..1..0..2....2..1..0..1..0..1
..0..1..0..2..1..0....2..1..2..1..0..2....2..1..0..2..1..0....2..1..2..1..2..1
..2..1..0..2..1..0....2..1..0..2..1..0....0..2..1..0..1..2....0..1..2..1..0..1
..2..1..0..2..1..0....2..1..0..2..1..2....1..0..1..0..1..2....2..1..2..1..2..0
..0..2..1..0..1..0....0..2..1..0..1..0....1..2..1..2..1..0....0..1..2..0..1..0
..1..0..1..2..1..0....1..0..1..2..1..0....1..0..1..2..1..0....2..0..1..2..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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