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A266044
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Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any vertical or antidiagonal neighbor equal to 4-1.
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1
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8, 104, 2408, 74416, 2603736, 97230000, 3787995368, 152165487408, 6256996794664, 262070255471888, 11141539251200152, 479536056600705392, 20854033903834109000, 914926763605653165712, 40446653776796028311816
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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
..0..2..1..3....2..1..3..2....2..1..2..2....0..3..2..3....3..3..1..1
..2..0..1..2....0..1..2..3....3..3..0..0....1..3..2..2....2..1..1..0
..0..1..3..3....0..0..3..1....2..1..1..1....1..3..0..0....3..0..0..2
..0..1..2..3....2..1..3..0....0..0..3..3....1..2..1..0....2..2..0..3
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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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