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A232924
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Number of 5Xn 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, diagonally or antidiagonally
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1
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243, 486, 5118, 37008, 316800, 2515716, 20706696, 167584476, 1367432712, 11114122476, 90504770460, 736322452020, 5993199861276, 48770296532280, 396915186768744, 3230114185683960, 26287470177830052, 213931378583656296
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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) +31*a(n-2) -97*a(n-3) -163*a(n-4) +417*a(n-5) +93*a(n-6) -514*a(n-7) +192*a(n-8) +72*a(n-9) -36*a(n-10) for n>11
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EXAMPLE
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Some solutions for n=4
..1..2..1..2....1..2..1..2....2..1..2..2....0..1..2..2....0..1..0..0
..2..2..1..0....1..0..1..2....0..1..2..1....2..1..2..2....0..1..0..1
..1..2..1..0....1..0..1..0....2..1..0..1....0..1..2..1....0..0..0..0
..1..0..1..0....0..0..1..2....2..1..2..1....0..1..2..1....0..0..0..1
..1..0..1..0....0..0..1..0....2..2..2..1....2..1..2..1....0..1..0..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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