OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Tau Function.
MATHEMATICA
1 + Position[Table[-1 + SelectFirst[Range[0, 5], !Divisible[RamanujanTau@ n, n^#] &], {n, 2, 2000}], 2][[All, 1]] (* Michael De Vlieger, Dec 23 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama and Robert G. Wilson v, Dec 23 2017
STATUS
approved