OFFSET
0,3
EXAMPLE
a(6)+a(7) = 28. 1,3,5,9,11,13,15,17,19,... is the sequence of positive integers which are coprime to 28. 17 is the 8th of these integers, so a(8) = 17.
PROG
(PARI) {m=64; print1(c=1, ", ", b=1, ", "); for(n=2, m, k=n; s=c+b; a=0; while(k>0, a++; if(gcd(s, a)==1, k--)); print1(a, ", "); c=b; b=a)} - (Klaus Brockhaus, Aug 09 2006)
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Aug 08 2006
EXTENSIONS
More terms from Klaus Brockhaus, Aug 09 2006
STATUS
approved