Primes of the form (3^n + 5^n)/2.

[zak seidov]

Not appeared in OEIS:

%S A000001 17, 353, 198593
%N A000001 Primes of the form (3^n + 5^n)/2.
%C A000001 Corresponding n's are 2^1, 2^2, and 2^3.
What are next terms?
Cf. A074606 3^n + 5^n. 
%A A000001 Zak Seidov, Aug 27 2006

My kind request to gurus:
What are next terms?
Thanks, Zak



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