OFFSET
1,2
COMMENTS
1 together with composite numbers that are not multiples of 3.
FORMULA
a(n) = A157695(n-1), n>1. [From R. J. Mathar, Feb 07 2010]
a(n) ~ 1.5n.
CROSSREFS
KEYWORD
nonn,less
AUTHOR
Juri-Stepan Gerasimov, Jan 21 2010
EXTENSIONS
Edited by Charles R Greathouse IV, Mar 19 2010
STATUS
approved