Mathematics · Sequences and Series
Let ⟨an⟩ be a sequence such that a1 + a2 + ... + an = n2 + 3n(n+1)(n+2). If 28∑ Testbook k=1 1ak = p1p2...pm, where p1, p2, ..., pm are the first m consecutive prime numbers, then m is equal to:
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