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A201726
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Number of nX5 0..4 arrays with rows and columns lexicographically nondecreasing and no element equal to the number of horizontal and vertical neighbors equal to itself
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1
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56, 16493, 9603489, 4720850001, 1692459595971, 463016032498283, 100953294298736546, 18122671914754530341, 2749005920875643617934, 359691065136570782416660, 41268528292416431754552427
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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..0..0..1..4....0..0..1..3..3....1..2..3..4..4....0..1..2..3..4
..2..2..3..4..1....0..0..4..2..3....4..1..3..4..4....0..3..3..3..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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