English

Super congruences concerning binomial coefficients and Ap\'ery-like numbers

Number Theory 2020-02-28 v1

Abstract

Let pp be a prime with p>3p>3, and let a,ba,b be two rational pp-integers. In this paper we present general congruences for k=0p1(ak)(1ak)pk+b(modp2)\sum_{k=0}^{p-1}\binom ak\binom{-1-a}k\frac p{k+b}\pmod {p^2}. For n=0,1,2,n=0,1,2,\ldots let DnD_n and bnb_n be Domb and Almkvist-Zudilin numbers, respectively. We also establish congruences for n=0p1Dn16n,n=0p1Dn4n,n=0p1bn(3)n,n=0p1bn(27)n(modp2)\sum_{n=0}^{p-1}\frac{D_n}{16^n},\quad \sum_{n=0}^{p-1}\frac{D_n}{4^n}, \quad \sum_{n=0}^{p-1}\frac{b_n}{(-3)^n},\quad \sum_{n=0}^{p-1}\frac{b_n}{(-27)^n}\pmod {p^2} in terms of certain binary quadratic forms.

Keywords

Cite

@article{arxiv.2002.12072,
  title  = {Super congruences concerning binomial coefficients and Ap\'ery-like numbers},
  author = {Zhi-Hong Sun},
  journal= {arXiv preprint arXiv:2002.12072},
  year   = {2020}
}

Comments

35 pages

R2 v1 2026-06-23T13:56:00.231Z