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A230816
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Number of nX5 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero
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1
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0, 2, 100, 816, 28772, 497166, 10872238, 222626294, 4556094076, 94532505000, 1941906344228, 40087399972486, 826150677451514, 17030503979740618, 351123996865798068, 7237977275451164624, 149217812560349005972
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..2..1..0..1....0..1..2..1..0....0..1..2..1..0....0..2..1..0..2
..1..0..1..2..2....2..1..0..1..2....2..1..0..1..2....1..2..0..2..1
..2..2..2..1..0....2..1..0..0..2....2..1..0..1..2....0..1..2..0..0
..0..1..0..2..1....0..1..2..0..1....0..1..2..1..0....2..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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