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A271334
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Number of nXnXn triangular 0..2 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.
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1
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0, 1, 33, 3798, 960152, 577747260, 859484671068, 3228364497866668, 31015380724025975076, 768618082059444147510936, 49424325752577827724130126584, 8281603003824497703886704133613172
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OFFSET
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1,3
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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........0........0........0........0........0........0........0
....1.1......1.2......1.0......1.0......1.2......1.0......0.1......0.0
...2.1.1....0.2.1....2.0.1....1.0.0....0.1.2....0.1.1....0.1.1....1.1.1
..0.1.2.1..0.0.2.0..0.0.0.2..1.2.1.2..1.2.2.2..1.1.1.2..0.1.0.2..0.0.2.2
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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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