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A266134
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Number of 4Xn integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.
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1
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1, 61, 385, 572, 3851, 44623, 347576, 1650710, 12360130, 106235031, 807578953, 5406175833, 41246496374, 328408364493, 2509089355110, 18435763834038, 141054581587168, 1100340622468942, 8442342552511565, 63751061176641632
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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..1..1..0....0..0..0..0....1..0..1..2....1..2..0..1....2..1..1..0
..2..3..2..2....1..2..2..0....1..1..1..2....1..0..2..0....0..1..1..2
..2..1..1..0....1..1..0..1....1..1..0..1....2..1..0..0....1..2..2..1
..2..1..0..1....1..0..2..0....1..0..2..0....2..1..2..0....0..0..0..0
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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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