OFFSET
1,2
COMMENTS
A cube k is a term iff k belongs to A062838; in this case, k = p_1^3 * p_2^3 *...* p_r^3 and bigomega(k) = 3*omega(k) = 3*r. - Bernard Schott, May 09 2022
LINKS
Enrique PĂ©rez Herrero, Table of n, a(n) for n = 1..2000
MATHEMATICA
Select[Range[3000], PrimeOmega[#] == 3*PrimeNu[#] &] (* Amiram Eldar, Jun 29 2022 *)
PROG
(PARI) is(n)=my(f=factor(n)[, 2]); vecsum(f)==3*#f \\ Charles R Greathouse IV, Oct 16 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Jan 31 2003
STATUS
approved