scholarly journals Supercongruences involving Apéry-like numbers and binomial coefficients

2021 ◽  
Vol 7 (2) ◽  
pp. 2729-2781
Author(s):  
Zhi-Hong Sun ◽  
Keyword(s):  

<abstract><p>Let $ \{S_n\} $ be the Apéry-like sequence given by $ S_n = \sum_{k = 0}^n\binom nk\binom{2k}k\binom{2n-2k}{n-k} $. We show that for any odd prime $ p $, $ \sum_{n = 1}^{p-1}\frac {nS_n}{8^n}{\equiv} (1-(-1)^{\frac{p-1}2})p^2\ (\text{ mod}\ {p^3}) $. Let $ \{Q_n\} $ be the Apéry-like sequence given by $ Q_n = \sum_{k = 0}^n\binom nk(-8)^{n-k}\sum_{r = 0}^k\binom kr^3 $. We establish many congruences concerning $ Q_n $. For an odd prime $ p $, we also deduce congruences for $ \sum_{k = 0}^{p-1}\binom{2k}k^3\frac 1{64^k}\ (\text{ mod}\ {p^3}) $, $ \sum_{k = 0}^{p-1}\binom{2k}k^3\frac 1{64^k(k+1)^2}\ (\text{ mod}\ {p^2}) $ and $ \sum_{k = 0}^{p-1}\binom{2k}k^3\frac 1{64^k(2k-1)}\ (\text{ mod}\ p) $, and pose lots of conjectures on congruences involving binomial coefficients and Apéry-like numbers.</p></abstract>

1985 ◽  
Vol 92 (8) ◽  
pp. 576-578 ◽  
Author(s):  
Roger C. Alperin
Keyword(s):  

2019 ◽  
Vol 101 (3) ◽  
pp. 367-378
Author(s):  
ZHI-HONG SUN

Let $p>3$ be a prime and let $a$ be a rational $p$-adic integer with $a\not \equiv 0\;(\text{mod}\;p)$. We evaluate $$\begin{eqnarray}\mathop{\sum }_{k=1}^{(p-1)/2}\frac{1}{k}\binom{a}{k}\binom{-1-a}{k}\quad \text{and}\quad \mathop{\sum }_{k=0}^{(p-1)/2}\frac{1}{2k-1}\binom{a}{k}\binom{-1-a}{k}\end{eqnarray}$$ modulo $p^{2}$ in terms of Bernoulli and Euler polynomials.


1985 ◽  
Vol 92 (8) ◽  
pp. 576 ◽  
Author(s):  
Roger C. Alperin
Keyword(s):  

Author(s):  
Abdulkarim Magomedov ◽  
S.A. Lavrenchenko

New laconic proofs of two classical statements of combinatorics are proposed, computational aspects of binomial coefficients are considered, and examples of their application to problems of elementary mathematics are given.


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