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A215901
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Number of diagonal and antidiagonal neighbor colorings of the even squares of an nX5 array with new integer colors introduced in row major order
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1
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5, 15, 726, 12840, 2387217, 87852626, 37060769357, 2227156082842, 1701536105684377, 148049849095504726, 180712665575010594347, 21183598567292002167082, 38119060864386172887309827
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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..x..1..x..2....0..x..1..x..2....0..x..1..x..1....0..x..1..x..2
..x..3..x..3..x....x..3..x..4..x....x..2..x..2..x....x..3..x..4..x
..2..x..2..x..2....5..x..6..x..5....3..x..4..x..3....0..x..2..x..3
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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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