Conjecture on parametric Euler sums in terms of Hurwitz zeta values

For positive integers kk and mm, and complex αC\N\alpha\in\mathbb{C}\backslash\mathbb{N}^-, define the finite multiple harmonic sum ζn1({1}m)\zeta_{n-1}(\{1\}_m) by the notation used for multiple zeta sums. Consider the parametric Euler sums

 ⁣n=1 ⁣ζn1({1}m)n(n+α), ⁣n=1 ⁣ζn1({1}m)(n+α)k+1.\displaystyle\!\sum_{n=1}^\infty \displaystyle\!\frac{\zeta_{n-1}(\{1\}_m)}{n(n+\alpha)},\qquad \displaystyle\!\sum_{n=1}^\infty \displaystyle\!\frac{\zeta_{n-1}(\{1\}_m)}{(n+\alpha)^{k+1}}.

Parametric Euler-sum conjecture. These sums can be evaluated in terms of Hurwitz zeta values and digamma functions. This extends the preceding explicitly known cases, but the source does not provide the asserted evaluation formulas.

Sources & referencesView supporting material

Primary source

Masanobu Kaneko, Weiping Wang, Ce Xu and Jianqiang Zhao, “Parametric Apéry-type Series and Hurwitz-type Multiple Zeta Values”, arXiv:2209.06770 (2024).

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