[seqfan] Re: Reference that "A027687 4-perfect numbers" is finite

[Neil Sloane]

Rather than introducing a new keyword for conjectured sequences, it is
better to use the entry in the Index to the OEIS under "Conjecture".

I just added A027687, A046060, A046061 there.

You can add further entries there yourself.

Neil

On Wed, Jul 25, 2012 at 10:12 AM, Charles Greathouse <
charles.greathouse at case.edu> wrote:

> Yes, it would be nice to be able to search for these things by
> keyword. I've toyed with the idea of mimicking the CSS |= selector by
> writing
>
> fini-conj (or even fini-?)
>
> which allows additional levels to be added if needed.
>
> This doesn't obviate the need for comments, but allows for much easier
> searching.
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University
>
> On Wed, Jul 25, 2012 at 9:34 AM,  <franktaw at netscape.net> wrote:
> > If we're going to have modified keywords, how about a "conj" modifier to
> > indicate a conjectured keyword? Then these would be
> "fini(conj),full(conj)".
> > This modifier would also apply to the "mult" keyword.
> >
> > It would be nice to also have a way to show that the infiniteness of a
> > sequence is conjectured.
> >
> > Franklin T. Adams-Watters
> >
> > -----Original Message-----
> > From: Georgi Guninski <guninski at guninski.com>
> >
> > On Mon, Jul 16, 2012 at 01:42:51PM +0400, Max Alekseyev wrote:
> >>
> >> I suspect that finiteness of A027687 is not proved but "extremly
> >> probable" as stated at Achim Flammenkamp's page:
> >> http://wwwhomes.uni-bielefeld.de/achim/mpn.html
> >> (notice the difference between answers "yes and proved" and simply
> >> "yes" in the column "Are all discovered?").
> >>
> >> The flag 'fini' is thus inappropriate.
> >
> >
> > May be these should not be "fini" too:
> >
> > A046060                 5-multiperfect numbers.
> > A046061                 6-multiperfect numbers.
> >
> >
> > _______________________________________________
> >
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>
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>
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>



-- 
Dear Friends, I have now retired from AT&T. New coordinates:

Neil J. A. Sloane, President, OEIS Foundation
11 South Adelaide Avenue, Highland Park, NJ 08904, USA
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