sum of 1/A007504(n)

Max Alekseyev maxale at
Wed May 16 21:42:18 CEST 2007

On 5/16/07, Don Reble <djr at> wrote:
>     Does anyone know how to calculate the digamma function, _very_
>     accurately, for arbitrary (irrational) arguments?

I do not know specifics of digamma, but there is a generic trick that
can help track the precision of numerical computations in a
(black-box) math system (like maple, mathematica etc.).
First, your compute something with certain precision. Then you double
the precision and compute the very same thing. Comparing the former
and the latter results will give an idea of how accurate are your


More information about the SeqFan mailing list