OFFSET
1,2
LINKS
Omar E. Pol, Divisors and pi(x)
MATHEMATICA
Select[Range[100], !PrimeQ[PrimePi[#]]&] (* Harvey P. Dale, May 06 2019 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Omar E. Pol, Dec 18 2008
EXTENSIONS
Edited by N. J. A. Sloane, Dec 19 2008
STATUS
approved