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A230839
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Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero
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1
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0, 8974, 10550264, 9617769208, 8988055879558, 8428081775041778, 7899599586975791528, 7404104956669952823022, 6939731658949591906274844, 6504482883205181770088621656, 6096531906604802985735282788524
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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=3
..0..0..0..0..0..1....0..0..0..2..2..1....0..0..0..2..3..0....0..0..0..1..3..3
..1..2..1..0..1..2....1..1..0..3..0..3....1..3..1..2..1..1....1..0..3..2..0..3
..0..3..3..0..3..1....2..3..1..2..2..2....2..2..3..0..3..2....2..3..1..1..0..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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