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A216662
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Number of horizontal, vertical or knight-move neighbor colorings of an nX4 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..2..3....0..1..2..1....0..1..2..1....0..1..2..3....0..1..2..3
..3..2..4..0....3..4..5..3....3..2..3..0....4..0..5..0....1..4..5..6
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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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