OFFSET
1,1
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range@100, Length@Union@Mod[Range[#]^2, #] < EulerPhi[#] &] (* Ivan Neretin, Dec 14 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Max Alekseyev, Sep 18 2006
STATUS
approved