OFFSET
1,5
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
MATHEMATICA
With[{nn=120}, Take[PrimeNu/@Union[Flatten[{3^#[[1]] 5^#[[2]], 5^#[[1]] 3^#[[2]]}&/@Tuples[Range[0, nn], 2]]], nn]] (* Harvey P. Dale, Nov 29 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Sep 18 2005
STATUS
approved