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A270602
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Number of nXnXn triangular 0..4 arrays with some element plus some adjacent element totalling 4+1 or 4-1 exactly once.
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0
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0, 36, 1716, 171576, 46957788, 38923001616, 98204118828408, 744477422244654948, 16863964449356423397084, 1140493290200331813320727636, 230373612505462103444572129923504
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
.....0........1........0........0........3........4........4........0
....4.0......1.0......0.2......0.1......1.1......0.0......0.0......0.2
...2.4.4....1.3.1....4.2.0....4.0.3....3.3.4....0.0.0....0.0.2....0.0.2
..3.4.2.0..1.3.1.3..4.0.1.0..4.0.1.3..4.4.3.3..1.2.2.2..0.1.1.0..1.2.0.2
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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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