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Evaluations of sum_(k=1)^infty frac{x^k}{k²binom{3k}{k}} and related series

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arxiv 2401.12083 v1 pith:MJ7EROO7 submitted 2024-01-22 math.CO math.NT

Evaluations of sum_(k=1)^infty frac{x^k}{k²binom{3k}{k}} and related series

classification math.CO math.NT
keywords binomfracinftyseriesrelatedcertainchoicesclasses
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We perform polylogarithmic reductions for several classes of infinite sums motivated by Z.-W. Sun's related works in 2022--2023. For certain choices of parameters, these series can be expressed by cyclotomic multiple zeta values of levels $4$, $5$, $6$, $7$, $8$, $9$, $10$, and $12$. In particular, we obtain closed forms of the series $$\sum_{k=0}^\infty\frac{x_0^k}{(k+1)\binom{3k}k} \ \ \text{and}\ \ \sum_{k=1}^\infty\frac{x_0^k}{k^2\binom{3k}k}$$ for any $x_0\in(-27/4,27/4)$.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Derivative sums of balanced gamma quotients and multiple zeta values: four conjectures of Zhi-Wei Sun

    math.GM 2026-07 accept novelty 8.0

    Balanced gamma quotients reduce derivative sums to ordinary multiple zeta values, proving and correcting four conjectures of Sun without numerical fitting.

  2. Weighted Derivative Sums of a Gamma Quotient: Sun's Conjecture and Cyclotomic Specializations

    math.GM 2026-07 conditional novelty 6.0

    Weighted master identity for Γ(x)²/(2Γ(2x)) gives all-derivative-order sums in zeta and log-sine values and proves Sun's Conjecture 4.1.