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A230181
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Number of nX5 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j)
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1
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15, 825, 44487, 2432241, 133265847, 7303192425, 400233701367, 21933865129257, 1202033948127351, 65874647188725513, 3610105315787830647, 197843342593747917321, 10842339706191376541559, 594188961646805379691401
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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) = 63*a(n-1) -464*a(n-2) +800*a(n-3) +500*a(n-4) -124*a(n-5) -64*a(n-6) for n>8
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EXAMPLE
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Some solutions for n=3
..2..0..2..1..1....1..1..2..0..2....2..0..0..1..1....0..2..0..2..1
..2..2..2..0..2....1..0..1..1..1....2..2..1..1..0....0..0..1..1..1
..0..2..2..1..1....2..1..2..0..2....0..1..1..2..0....2..2..0..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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