1,1

Erdős showed that this sequence has density 1/2.

Table of n, a(n) for n=1..72.

P. Erdős, Note on the number of prime divisors of integers, J. London Math. Soc. 12 (1937), pp. 308-314.

a(n) ~ 2n. - Charles R Greathouse IV, Dec 05 2012

(PARI) is(n)=omega(n) > log(log(n)) \\ Charles R Greathouse IV, Dec 05 2012

Sequence in context: A023784 A028823 A258264 * A246096 A098314 A052057

Adjacent sequences: A074736 A074737 A074738 * A074740 A074741 A074742

easy,nonn

Benoit Cloitre, Sep 05 2002

approved