OFFSET
1,3
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
MATHEMATICA
Table[c=Prime[n]; c-1-EulerPhi[EulerPhi[c]], {n, 70}] (* Harvey P. Dale, Feb 12 2013 *)
PROG
(PARI) forprime(i=2, 600, p=0; for(q=1, i-1, if(znorder(Mod(q, i))!=eulerphi(i), p++)); print1(p", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
V. Raman, Nov 10 2012
STATUS
approved