OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
Wikipedia, Totient numbers.
EXAMPLE
2 is a term since 2, 4, 6 and 8 are all totient numbers.
PROG
(PARI) m = 4; v = vector(m); for(k=1, m, v[k] = istotient(2*k)); for(k = m+1, 1500, if(Set(v) == [1], print1(2*(k-m), ", ")); v = concat(v[2..m], istotient(2*k)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Amiram Eldar, Mar 05 2020
STATUS
approved