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Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.

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Claim. For k=5k=5 there is an nn with ∏0≤i≤5(n−i)∣(2nn)\prod_{0\le i\le 5}(n-i)\mid\binom{2n}{n}, as Problem 396 asks: the least such nn is 36488413648841, the term a(5)a(5) of the OEIS entry A375077, which its extension line credits to Chai Wah Wu on 1 August 2024. A witness is checked through Kummer's theorem, as Stephan's page explains.

Covers. The instance k=5k=5 of the question, with the answer yes by an explicit witness.

Depends on. No page of this wiki.

Standing. The entry is an edited database record, not a refereed publication, and the site's commentary on a problem it labels OPEN points to the entry without accepting a result. The claim stays claimed.