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MathNet 2019-part-06 — 184 problems (EN–VI) Question 156

Math Olympiad Vault · MathNet 2019-part-06 — 184 problems (EN–VI)

Question 156

Determine whether there exists a finite set $S$ of positive prime numbers such that for every integer $n \geq 2$, the number $2^{2}+3^{2}+\cdots+n^{2}$ is a multiple of some element of $S$.