[seqfan] Re: Dumb idea: Number of permanent keywords of OEIS sequence A_n

[Alex Meiburg]

Are there, then, any particular keywords for which a sequence could be
generated? e.g. "1 if A_n is finite, 0 otherwise"? (Something like "1 if
A_n is finite, 0 if infinite, -1 if unknown" would go a lot longer but of
course have to change with time, which is probably bad.) Would still
encourage people to look hard at some here and there. Of course it's very
unlikely that we ever get passed (for instance) https://oeis.org/A019434 .

-- Alexander Meiburg

On Thu, Apr 12, 2018 at 8:00 AM, Alonso Del Arte <alonso.delarte at gmail.com>
wrote:

> Felix,
>
> The problem with that one, in my opinion, is that it depends way too much
> on the human factor, even when ignoring temporary keywords. For example, I
> never kept track of which entries I've added keyword:easy to (just added
> one this morning), and there probably are still a lot of them that need to
> have that keyword (like a lot of the reciprocals).
>
> And what about frac? Might there be entries that ought to have that
> keyword? Isn't more somewhat temporary in nature? etc.
>
> These uncertainties are not at all delicious like the uncertainties
> surrounding A053873, Numbers n such that OEIS sequence A_n contains n.
> Those uncertainties compel us to make theories and compute sequences to
> farther reaches. The uncertainties with this keyword sequence entry might
> compel us to new discussions about keywords, but most likely those would
> eventually happen regardless.
>
> Just my two cents.
>
> Al
>
> On Thu, Apr 12, 2018 at 10:24 AM, Felix Fröhlich <felix.froe at gmail.com>
> wrote:
>
> > Dear SeqFans,
> >
> > here is an idea for a sequence that should most likely not be in the
> OEIS:
> >
> > Number of permanent keywords of OEIS sequence A_n.
> >
> > "Permanent" here means the sequence does not count keywords like
> "changed",
> > that are only applied temporarily. The sequence (with offset 1) starts
> >
> > 4, 4, 3, 4, 6, 3, 5, 3, 4, 6, 3, 7, 3, 4, 2, 3, 1, 1, 3, 1
> >
> > This is mostly meant to be a humorous suggestion. I don't know whether
> this
> > would be acceptable as a "dumb" sequence or not, but anyway, I do not
> > really seriously consider submitting this. It falls into the same
> category
> > as other sequences related to A-numbers, and I recall Neil said somewhere
> > there are already more than enough such sequences in the OEIS.
> >
> > Best regards
> > Felix
> >
> > --
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
>
>
> --
> Alonso del Arte
> Author at SmashWords.com
> <https://www.smashwords.com/profile/view/AlonsoDelarte>
> Musician at ReverbNation.com <http://www.reverbnation.com/alonsodelarte>
>
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> Seqfan Mailing list - http://list.seqfan.eu/
>