OFFSET
1,1
COMMENTS
See comment at analogous sequence A053474.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
If k = 19 then there is no number x such that phi(x) = k exists; however, phi(19) = 18.
k = 27 is also a nontotient number whose totient is 18.
PROG
(PARI) lista(nn) = for (n=1, nn, if (!istotient(n), print1(eulerphi(n), ", "))); \\ Michel Marcus, Nov 20 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jan 17 2000
STATUS
approved