English

Series associated with a forgotten identity of N\"orlund

General Mathematics 2024-10-31 v1

Abstract

We apply a seemingly forgotten series expression of N\"orlund for the psi function to express infinite series involving inverse factorials in closed form. Many of such series contain products of Catalan numbers and (odd) harmonic numbers. We also prove some new series for π\pi.

Keywords

Cite

@article{arxiv.2410.22343,
  title  = {Series associated with a forgotten identity of N\"orlund},
  author = {Kunle Adegoke and Robert Frontczak},
  journal= {arXiv preprint arXiv:2410.22343},
  year   = {2024}
}