[seqfan] Re: Fwd: Primes in an exponential sequence
Robert Israel
israel at math.ubc.ca
Mon Feb 8 03:30:40 CET 2010
Also for n=1, of course. Less trivial: n=942 (according to Maple).
Robert Israel israel at math.ubc.ca
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada
On Mon, 8 Feb 2010, Olivier Gerard wrote:
> 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
>
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