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A004322
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Binomial coefficient C(3n,n-4).
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1
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1, 15, 153, 1330, 10626, 80730, 593775, 4272048, 30260340, 211915132, 1471442973, 10150595910, 69668534468, 476260169700, 3245372870670, 22057981462440, 149608375854525, 1012974972473835, 6848956078664700
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OFFSET
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4,2
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REFERENCES
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 828.
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LINKS
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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