A096919 Greatest prime factor of n-th product of 3 distinct primes.

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

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 A357099 A277777

Adjacent sequences: A096916 A096917 A096918 * A096920 A096921 A096922

Keyword

nonn

Author

Reinhard Zumkeller, Jul 15 2004

Status

approved