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A183718
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1/20 of the number of (n+1) X 9 0..4 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease.
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1
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985, 18566, 303170, 5374440, 94463507, 1680902120, 29887741084, 532844962952, 9498797049301, 169444214222538, 3022597001362206, 53927539247910656, 962146234750661827, 17166919088214504572, 306297928172424966016
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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 3 X 9:
..0..2..0..1..0..2..0..2..1....0..3..0..4..0..3..4..3..0
..4..3..4..2..4..3..4..3..0....1..2..1..2..1..2..1..2..1
..1..2..0..1..0..2..0..2..1....0..3..4..3..0..3..0..3..4
...
...R..L..R..L..R..L..R..L.......L..R..L..R..L..R..L..R...
...L..R..L..R..L..R..L..R.......R..L..R..L..R..L..R..L...
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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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