OFFSET
1,2
EXAMPLE
The sum of the first 6 terms of the sequence is 128. There are 4 terms from among the first 6 terms of the sequence that are coprime to 128 (a(1)=1, a(3)=5, a(4)=11, a(6)=79). So a(7)= a(6) + 1 + 5 + 11 + 79 = 175.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Jul 01 2007
EXTENSIONS
More terms from Joshua Zucker, Jul 18 2007
STATUS
approved