OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1300
MATHEMATICA
Join[{1}, Select[Range[2, 500], Mod[#, PrimeNu[#]^2] != 0 &]] (* G. C. Greubel, Apr 24 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Nov 17 2013
STATUS
approved