[seqfan] Re: find generating function?

Maximilian Hasler maximilian.hasler at gmail.com
Fri Apr 26 14:06:58 CEST 2013


I don't think there's a GF,
your sequence appears to be
 { 2^k } U 2*{p in A176162, p>=19}
where
A176162 = primes p such that (p-2)/5 is not a prime number.

Maximilian


On Thu, Apr 25, 2013 at 2:05 PM, Jonathan Stauduhar <jstdhr at gmail.com> wrote:
> Hi all,
>
> I ran a sequence through superseeker and all I got back was the following:
>
>  SUGGESTION: LISTTOALGEQ FOUND ONE OR MORE ALGEBRAIC
> EQUATIONS SATISFIED BY THE GEN. FN.
> WARNING: THESE MAY BE ONLY APPROXIMATIONS!
> Equation(s) and type(s) are:
>
>                                     2              3              4
> [-262144 + 589824 a(n) - 589824 a(n)  + 344064 a(n)  - 129024 a(n)
>                  5            6           7          8       9
>      + 32256 a(n)  - 5376 a(n)  + 576 a(n)  - 36 a(n)  + a(n) , lgdogf]
>
>
> The sequence begins 1, 4, 8, 16, 32, 38, 46, 58, 62, 64, 82, 86, 94, 106,
> 118, 122, 128, 142.  Can someone use the suggestion above to find the
> generating function that produces this sequence, if possible?  I don't know
> how to do this.
>
> Thanks,
>
> Jonathan
>
>
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