OFFSET
1,1
FORMULA
a(n) = n + O(n/log n). - Charles R Greathouse IV, Oct 19 2015
MATHEMATICA
nn=200; Complement[Range[nn], Prime[Range[PrimePi[nn]]], Range[Sqrt[nn]]^2, Range[nn^(1/3)]^3] (* Harvey P. Dale, Jan 26 2011 *)
PROG
(PARI) is(n)=n>1 && !isprime(n) && !issquare(n) && !ispower(n, 3) \\ Charles R Greathouse IV, Oct 19 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, May 03 2005
STATUS
approved