OFFSET
1,4
COMMENTS
If n is a prime number, a(n) = 1 because of the fact that A001035(p^k) == 1 mod p for all primes p.
If n is an even number, a(n) is a number of the form 3^k for n <= 19. How is the distribution of terms of the form 3^k in this sequence?
EXAMPLE
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Altug Alkan, Jan 05 2016
STATUS
approved