[seqfan] Re: A002094 from 1875 needs more terms

Neil Sloane njasloane at gmail.com
Sat Mar 17 19:20:18 CET 2018


Richard, Thanks for figuring out the correct definition!  I have changed
the definition accordingly.

It would be nice to have more terms, even if they were found by direct
enumeration using one
of the methods that Richard suggests - both as a check on Schiff's values,
and in the hope
that given enough terms we could guess a generating function.

Best regards
Neil

Neil J. A. Sloane, President, OEIS Foundation.
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com


On Sat, Mar 17, 2018 at 1:08 PM, Hugo Pfoertner <yae9911 at gmail.com> wrote:

> The German in Schiff's article is difficult to understand, but it is my
> impression that at the time of writing the meaning of "alcohol radical" was
> different from the modern use, where it means an "-OH" attached to a
> hydrocarbon.
> https://www.britannica.com/science/alcohol/Structure-and-
> classification-of-alcohols
> So perhaps the name of the sequence should be adapted to modern chemical
> terminology and "alcohol" be dropped. The title of Richard's illustrations
> might be a candidate for a less misleading sequence title.
>
> Schiff 's Hydrocarbons with a Single Ring
>
> Hugo Pfoertner
>
> On Sat, Mar 17, 2018 at 5:44 PM, Richard J. Mathar <mathar at mpia-hd.mpg.de>
> wrote:
>
> > In response to http://list.seqfan.eu/pipermail/seqfan/2018-March/
> > 018463.html :
> >
> > As an appetizer I added illustrations for the first few terms (as far as
> I
> > understand the compositions) to http://oeis.org/A002094 .
> >
> > RJM
> >
> > --
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
>



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