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A096918
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Intermediate prime-factor of n-th product of 3 distinct primes.
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7
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| A096917(n)*a(n)*A096919(n)=A007304(n); A096917(n)<a(n) < A096919(n).
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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 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 10 2010]
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CROSSREFS
| Sequence in context: A002373 A103153 A162022 * A075018 A125958 A132448
Adjacent sequences: A096915 A096916 A096917 * A096919 A096920 A096921
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KEYWORD
| nonn
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 15 2004
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