[seqfan] Re: Fwd: Primes in an exponential sequence

[Artur]

Also for n=0 is prime
Best wishes
Artur

Robert Israel pisze:
> 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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