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A201725
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Number of nX4 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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35, 3567, 499474, 56836178, 4720850001, 299927801278, 15249209002599, 640855702702745, 22831719167592564, 703807755707555744, 19083627099219491070, 461269189538111185232, 10047567066462239739922
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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..4..4....0..2..3..4....0..0..0..3....0..0..3..3....1..3..3..4
..1..2..2..3....0..3..0..0....0..2..3..1....1..4..2..2....4..0..0..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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