[seqfan] Re: Integer Sequence Analysis in Mathematica 7

[Eric W. Weisstein]

On Fri, 21 Nov 2008, Alexander Povolotsky wrote:

> Dear Maximilian,
>
> I was not talking ggf, I meant closed form analytical formula
>
> For example PURRS (The Parma University's Recurrence Relation Solver)
> http://www.cs.unipr.it/purrs/  yields the following:

This is perhaps a bit simpler :)

Table[
   HypergeometricPFQ[{1/3 - n/3, 2/3 - n/3, -(n/3)}, {1/2 - n/2, 1 - n/2}, -(27/4)],
{n, 20}]

{1, 1, 4, 5, 6, 10, 15, 21, 31, 46, 67, 98, 144, 211, 309, 453, 664, 973, 1426, 2090}

-Eric