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A096919 Greatest prime factor of n-th product of 3 distinct primes. 7
5, 7, 11, 7, 13, 17, 7, 11, 19, 13, 23, 11, 11, 17, 29, 13, 31, 19, 13, 37, 23, 11, 17, 41, 17, 43, 19, 13, 47, 19, 13, 29, 31, 53, 23, 23, 59, 17, 61, 37, 17, 11, 19, 67, 29, 41, 19, 71, 13, 43, 31, 29, 73, 17, 13, 31, 47, 79, 23, 19, 83, 23, 37, 53, 89, 37, 17, 41, 97, 59 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A096917(n)*A096918(n)*a(n) = A007304(n); A096917(n) < A096918(n) < a(n);

a(n) = A006530(A007304(n)).

LINKS

Table of n, a(n) for n=1..70.

MATHEMATICA

f[n_]:=Last/@FactorInteger[n]=={1, 1, 1}; f1[n_]:=Min[First/@FactorInteger[n]]; f2[n_]:=Max[First/@FactorInteger[n]]; lst={}; Do[If[f[n], AppendTo[lst, f2[n]]], {n, 0, 7!}]; lst (* Vladimir Joseph Stephan Orlovsky, Apr 10 2010 *)

CROSSREFS

Sequence in context: A076546 A167372 A023590 * A023594 A277777 A254930

Adjacent sequences:  A096916 A096917 A096918 * A096920 A096921 A096922

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 15 2004

STATUS

approved

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Last modified December 7 05:14 EST 2019. Contains 329839 sequences. (Running on oeis4.)