Congruences for the Apéry numbers modulo $p^3$
Abstract: Let ${A'n}$ be the Ap\'ery numbers given by $A'_n=\sum{k=0}n\binom nk2\binom{n+k}k.$ For any prime $p\equiv 3\pmod 4$ we show that $A'{\frac{p-1}2}\equiv \frac{p2}3\binom{\frac{p-3}2}{\frac{p-3}4}{-2}\pmod {p3}$. Let ${t_n}$ be given by $$t_0=1,\ t_1=5\quad\hbox{and}\quad t{n+1}=(8n2+12n+5)t_n-4n2(2n+1)2t_{n-1}\ (n\ge 1).$$ We also obtain the congruences for $t_p\pmod {p3},\ t_{p-1}\pmod {p2}$ and $t_{\frac{p-1}2}\pmod {p2}$, where $p$ is an odd prime.
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