1,1

Each term is of the form p^k where p is prime. For n > 1, k is even.

Can it be proved that a(n) exists for all n?

Table of n, a(n) for n=1..18.

Sequence in context: A254744 A009795 A182562 * A223664 A189611 A189689

Adjacent sequences: A112719 A112720 A112721 * A112723 A112724 A112725

nonn,base

Farideh Firoozbakht, Oct 10 2005

approved