OFFSET
1,2
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Perfect Powers.
Eric Weisstein's World of Mathematics, Squarefree Part.
MATHEMATICA
Prepend[Map[Times @@ FactorInteger[#][[All, 1]] &, DeleteCases[#, 0]], 1] &@ Table[If[Set[e, GCD @@ #[[All, -1]]] > 1, Power[n, 1/e], 0] &@ FactorInteger[n], {n, 4000}] (* Michael De Vlieger, Apr 25 2017 *)
PROG
(Haskell)
a076403 = a007947 . a025478 -- Reinhard Zumkeller, Mar 28 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Oct 09 2002
STATUS
approved