[seqfan] Re: A314159
Joerg Arndt
arndt at jjj.de
Sat Apr 23 08:48:07 CEST 2016
To set a bar:
Least inverse argument in the "best" arctan relation for Pi, see
http://jjj.de/arctan/arctanpage.html (bottom of page)
Sequence starts 1, 5, 18, 57, 192, 577, ...
The problem goes back to Gauss / Stormer / Lehmer and others.
I attacked the problem in 1993 and again in 2006.
Problem: as far as I know only 1 and 5 are proven.
I speculate that the terms up to 390112 are OK as given.
For some background see Section 32.5, pages 366ff in
http://jjj.de/fxt/#fxtbook
Best regards, jj
* Olivier Gerard <olivier.gerard at gmail.com> [Apr 21. 2016 10:57]:
> Dear Neil ad all,
>
> What about a friendly contest for the nicest and most interesting
> pi-related sequence ?
>
> The award would be this A-number.
>
> Olivier
>
>
>
> On Thu, Apr 21, 2016 at 2:27 AM, Frank Adams-Watters <franktaw at netscape.net>
> wrote:
>
> > It's too late to do anything special for A271828, but maybe something can
> > be done with A314159.
> >
> > Franklin T. Adams-Watters
> >
> >
> > --
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
More information about the SeqFan
mailing list