OFFSET
1,3
FORMULA
a(n)=n-sqrt(n)+O(n^(1/4)). - Benoit Cloitre, Jul 23 2009
PROG
(PARI) a(n)=if(n<2, 1, n-a(sqrtint(n))) \\ Benoit Cloitre, Jul 23 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Rick L. Shepherd, Jul 20 2004
STATUS
approved