[seqfan] Re: Linear recurrence and g.f. in A099458

Olivier Gerard olivier.gerard at gmail.com
Thu Nov 22 22:49:44 CET 2012


Dear Richard,

The g.f. is

(1 - x^4)/(1 - 4 x + 7 x^2 - 4 x^3 + x^4)

instead of

1/(1 - 4 x + 7 x^2 - 4 x^3 + x^4)

where

1 - 4 x + 7 x^2 - 4 x^3 + x^4

is the Alexander "polynomial" of 9_44 multiplied by x^2

Regards,


Olivier

On Thu, Nov 22, 2012 at 9:45 PM, mathar <mathar at mpia-hd.mpg.de> wrote:

> Can someone resolve the discrepancy between the terms of
> http://oeis.org/A099458
> and the generating function in the formula?
>
> Richard
>
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