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A232369
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Number of n X n 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal
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0
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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
..1..2..3..2....3..2..3..0....2..3..0..3....1..0..3..2....0..3..0..3
..3..2..3..2....1..0..1..0....0..1..0..2....1..2..1..2....2..1..2..1
..3..2..3..0....1..0..1..0....3..2..3..2....1..0..1..0....0..1..2..3
..1..0..1..2....1..2..3..0....3..2..1..2....3..2..1..0....0..3..2..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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