English

An extension of Gauss congruences for Ap\'ery numbers

Number Theory 2024-04-26 v1 Combinatorics

Abstract

Osburn, Sahu and Straub introduced the numbers: \begin{align*} A_n^{(r,s,t)}=\sum_{k=0}^n{n\choose k}^r{n+k\choose k}^s{2k\choose n}^t, \end{align*} for non-negative integers n,r,s,tn,r,s,t with r2r\ge 2, which includes two kinds of Ap\'ery numbers and four kinds of Ap\'ery-like numbers as special cases, and showed that the numbers {An(r,s,t)}n0\{A_n^{(r,s,t)}\}_{n\ge 0} satisfy the Gauss congruences of order 33. We establish an extension of Osburn--Sahu--Straub congruence through Bernoulli numbers, which is one step deep congruence of the Gauss congruence for An(r,s,t)A_n^{(r,s,t)}.

Keywords

Cite

@article{arxiv.2404.16636,
  title  = {An extension of Gauss congruences for Ap\'ery numbers},
  author = {Ji-Cai Liu},
  journal= {arXiv preprint arXiv:2404.16636},
  year   = {2024}
}

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26 pages