OFFSET
1,3
LINKS
Diana Mecum, Table of n, a(n) for n = 1..500
EXAMPLE
There are 6 terms among the first 11 terms of the sequence which are each coprime to exactly one distinct prime dividing 12 (a(3)=2, a(4)=2, a(5)=4, a(6)=3, a(8)=3 and a(11)=10). So a(12) = 6.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Mar 03 2007
EXTENSIONS
More terms from Diana L. Mecum, Jun 23 2007
STATUS
approved