[seqfan] Fwd: Primes in an exponential sequence

[Olivier Gerard]

Perhaps someone has an idea on how to investigate this
for Vincenzo ?

---------- Forwarded message ----------
From: vincenzo.librandi at tin.it <vincenzo.librandi at tin.it>
Date: Sun, Feb 7, 2010 at 20:31


I only ask if the sequence
a(n)=2^(2*n)+2*n+1
is prime if and only if
n=3 and n=118 ?

Regards,
Vincenzo