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A267346
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Number of 6Xn arrays containing n copies of 0..6-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 6 and the upper left element equal to 0.
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0
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1, 1, 2, 2, 4, 135, 2192, 18140, 96291, 401459, 1594603, 7089502, 45031108, 518872408, 7088206956, 81255284697, 741934496544
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OFFSET
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1,3
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=6
..0..1..2..3..4..5....0..1..2..3..3..4....0..1..1..2..3..4....0..0..1..2..3..4
..1..2..3..4..5..0....1..2..2..3..4..5....0..1..1..2..3..4....0..1..2..3..4..5
..1..2..3..4..5..0....1..2..3..4..5..0....0..1..2..3..4..5....1..2..3..4..5..5
..1..2..3..4..5..0....2..3..4..5..0..1....1..2..3..4..5..0....1..2..3..4..5..0
..2..3..4..5..0..1....3..4..5..0..0..1....2..3..4..5..5..0....1..2..3..4..5..0
..3..4..5..0..1..2....4..5..5..0..1..2....2..3..4..5..5..0....2..3..4..5..0..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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