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A268181
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Number of 3Xn 0..n arrays with every repeated value in every row equal to, and in every column unequal to, the previous repeated value, and new values introduced in row-major sequential order.
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0
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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=3
..0..1..0....0..0..1....0..1..2....0..1..2....0..1..2....0..1..0....0..0..0
..2..0..0....2..2..3....3..2..0....1..1..0....3..2..1....2..0..0....1..1..2
..0..1..3....2..2..2....1..0..1....2..2..2....3..3..0....2..2..2....2..1..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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