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A265971
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Number of nX6 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.
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1
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4616, 190308, 339952, 721864, 1820904, 5006296, 13435392, 35632192, 95276272, 261736272, 709324400, 1927403116, 5292526288, 14866077768, 40973803912, 112866192572, 314639453512, 897120499588, 2505530846832, 6976518689796
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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..4..3..0..0..1....2..0..0..1..3..3....1..1..3..3..1..2....1..3..3..4..4..3
..0..1..3..2..2..3....1..3..3..1..0..0....4..0..0..4..4..0....2..4..1..0..0..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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