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 A096918 Intermediate prime factor of n-th product of 3 distinct primes. 7
 3, 3, 3, 5, 3, 3, 5, 5, 3, 5, 3, 7, 5, 5, 3, 7, 3, 5, 5, 3, 5, 7, 7, 3, 5, 3, 7, 7, 3, 5, 11, 5, 5, 3, 7, 5, 3, 7, 3, 5, 11, 7, 7, 3, 7, 5, 11, 3, 11, 5, 7, 5, 3, 13, 7, 5, 5, 3, 7, 13, 3, 11, 7, 5, 3, 5, 11, 7, 3, 5, 7, 13, 7, 3, 7, 5, 5, 3, 11, 11, 3, 5, 17, 7, 3, 7, 13, 7, 5, 3, 11, 5, 5, 11, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A096917(n)*a(n)*A096919(n) = A007304(n); A096917(n) < a(n) < A096919(n). LINKS Table of n, a(n) for n=1..95. MATHEMATICA f[n_]:=Last/@FactorInteger[n]=={1, 1, 1}; f1[n_]:=Min[First/@FactorInteger[n]]; f2[n_]:=Max[First/@FactorInteger[n]]; f3[n_]:=First/@FactorInteger[n][[2, 1]]; lst={}; Do[If[f[n], AppendTo[lst, f3[n]]], {n, 0, 7!}]; lst (* Vladimir Joseph Stephan Orlovsky, Apr 10 2010 *) CROSSREFS Sequence in context: A162022 A318240 A262289 * A075018 A324974 A125958 Adjacent sequences: A096915 A096916 A096917 * A096919 A096920 A096921 KEYWORD nonn AUTHOR Reinhard Zumkeller, Jul 15 2004 STATUS approved

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Last modified August 7 21:19 EDT 2024. Contains 375017 sequences. (Running on oeis4.)