OFFSET
1,3
COMMENTS
If a(n-1) = 1, then a(n) = n-1, obviously.
LINKS
Diana Mecum, Table of n, a(n) for n = 1..200
EXAMPLE
a(13)= 12. So a(14) = the number of terms among the first 13 terms which are divisible by the lowest prime dividing 12 (which is 2).
a(3)=2, a(5)=4, a(6)=2, a(9)=8, a(10)=4 and a(13) = 12 are the six terms each divisible by 2, so a(14) = 6.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Apr 22 2006
EXTENSIONS
More terms from Diana L. Mecum, May 29 2007
STATUS
approved