Does anyone know if this sum has a closed form formula ? $$\sum_{0 \leq k \leq n} \binom{n}{k}^2 x^k\\ n\in N$$
2026-03-28 05:28:41.1774675721
Series involving squares of binomial coefficients
60 Views Asked by user616256 https://math.techqa.club/user/user616256/detail AtRelated Questions in SEQUENCES-AND-SERIES
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