OFFSET
1,2
COMMENTS
If GCD(a(n),a(m))=1, then a(n)*a(m) is also in this sequence. - Enrique Pérez Herrero, Nov 23 2013
LINKS
Enrique Pérez Herrero, Table of n, a(n) for n = 1..5000
MATHEMATICA
Select[Range[1000], Mod[PrimeNu[#], 3]==0&]
PROG
(PARI) is(n)=omega(n)%3==0 \\ Charles R Greathouse IV, Sep 14 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Enrique Pérez Herrero, Jul 07 2012
STATUS
approved