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A265881
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Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no element plus any horizontal neighbor equal to n-1.
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0
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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=3
..1..0..0..1....1..2..1..0....2..2..2..1....1..2..2..1....0..1..0..0
..2..1..0..0....0..0..0..1....2..1..0..0....2..2..1..0....0..1..2..1
..2..1..2..2....2..2..1..2....0..1..0..1....0..0..1..0....2..2..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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