Congruences involving (2kk)2(4k2k)m−k\binom{2k}k^2\binom{4k}{2k}m^{-k}

preprint2011arXivOpen access

Abstract

Let p>3p>3 be a prime, and let mm be an integer with p∤mp\nmid m. In the paper, by using the work of Ishii and Deuring's theorem for elliptic curves with complex multiplication we solve some conjectures of Zhi-Wei Sun concerning ∑k=0p−1(2kk)2(4k2k)m−kmod  p2\sum_{k=0}^{p-1}\binom{2k}k^2\binom{4k}{2k}m^{-k}\mod {p^2}.

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