OFFSET
1,15
LINKS
T. D. Noe, Table of n, a(n) for n = 1..1000
MATHEMATICA
Table[Length[NestWhileList[EulerPhi[#] + 1 &, n, UnsameQ, All]] - 2, {n, 100}] (* T. D. Noe, Oct 17 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved