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 A120298 Largest prime factor of central factorial number A001819[n]. 0
 5, 7, 41, 479, 59, 266681, 63397, 514639, 178939, 242101, 18500393, 40799043101, 190297, 1844659, 78206663, 616798327, 38512247, 86364397717734821, 421950627598601, 84786899, 52030193, 31411862913089, 1422157053067 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS FORMULA a(n) = Max[FactorInteger[Sum[1/i^2,{i,1,n}]/Product[1/i^2,{i,1,n}]]]. MATHEMATICA Table[Max[FactorInteger[Sum[1/i^2, {i, 1, n}]/Product[1/i^2, {i, 1, n}]]], {n, 2, 30}] CROSSREFS Cf. A001819, A002701. Sequence in context: A189241 A167205 A123781 * A178342 A117751 A093526 Adjacent sequences:  A120295 A120296 A120297 * A120299 A120300 A120301 KEYWORD nonn AUTHOR Alexander Adamchuk, Jul 11 2006 STATUS approved

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Last modified April 12 01:36 EDT 2021. Contains 342912 sequences. (Running on oeis4.)