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A216661
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Number of horizontal, vertical or knight-move neighbor colorings of an nX3 array with new integer colors introduced in row major 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=2
..0..1..0....0..1..0....0..1..2....0..1..2....0..1..0....0..1..2....0..1..2
..2..3..4....2..0..3....3..0..1....3..4..5....2..0..2....1..3..4....3..2..4
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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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