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A205229
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Number of (n+1)X3 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero
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1
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266, 2773, 27157, 221766, 1707082, 11675764, 76088840, 460518847, 2683735998, 14905311330, 80378339143, 419363315736, 2137855359517, 10641083611371, 51996072608754, 249514965798706, 1179572239075227, 5497644720565445
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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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EXAMPLE
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Some solutions for n=4
..2..2..1....1..1..1....2..2..2....2..0..2....2..0..2....2..1..0....2..0..2
..2..0..2....0..1..2....0..1..0....2..1..1....0..1..0....2..0..2....0..2..2
..2..2..0....2..1..0....2..2..2....2..0..2....2..1..2....1..1..1....2..0..2
..2..0..2....1..1..1....1..2..2....1..1..2....0..2..0....1..1..1....1..2..2
..1..2..2....1..2..0....2..2..2....1..1..1....2..0..2....2..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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