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A166206
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Number of n X n X n triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 11.
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1
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1, 12, 4, 16, 357, 1880, 26443, 1765534, 25412877, 1480441810, 406769105056, 17832789481005
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OFFSET
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0,2
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LINKS
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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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