OFFSET
1,3
LINKS
Diana Mecum, Table of n, a(n) for n=1,...,569
EXAMPLE
The positive integers which are <= 9 and are missing from the first 8 terms of the sequence are 4,7,8,9. The sum of these integers is 28, so a(9) is the number of earlier terms which are coprime to 28. Therefore a(9) = 6.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, May 31 2007
EXTENSIONS
Added terms a(12) - a(569) Diana L. Mecum, Jan 01 2009
STATUS
approved