[seqfan] Re: Question regarding some sequences

Neil Sloane njasloane at gmail.com
Mon Dec 26 17:18:33 CET 2016


A036672 is taken from a well-known quite recent book from a major
publisher.  It has a number of important articles on the connections
between chemistry and graph theory, and is probably in every university
library.

I certainly have a copy myself, and I could scan the article at some point.

But it is quite a long article:

R. C. Read, The Enumeration of Acyclic Chemical Compounds, pp. 25-61 of A.
T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976;
see p. 60.

That is Chapter 4 of the book.  Chapter 5, another long chapter, also has
many sequences (including A001998).

A. T. Balaban, Enumeration of Cyclic Graphs, pp. 63-105 of A. T. Balaban,
ed., Chemical Applications of Graph Theory, Ac. Press, 1976; see p. 75.

If someone is in a rush to see these articles, maybe they could borrow the
book from a library and scan them in!  Or maybe it is available on-line by
now.  Natan, did you check?


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 Mon, Dec 26, 2016 at 5:57 AM, Frank Adams-Watters <franktaw at netscape.net>
wrote:

> Sorry, I can't help with your question.
>
> Please try to make subject lines meaningful in their context. A large
> fraction of the notes on this mailing list are questions regarding one or
> more sequences. Something like "Question regarding molecular sequences"
> would have been fine.
>
> Franklin T. Adams-Watters
>
> P.S. Someone should really look at the reference in A036672 and update the
> sequence. The sequence is marked as easy, but there's no formula, no
> program, and only a few terms.
>
>
> -----Original Message-----
> From: Natan Consigli <origami.experience at gmail.com>
> To: seqfan <seqfan at list.seqfan.eu>
> Sent: Mon, Dec 26, 2016 3:08 am
> Subject: [seqfan] Question regarding some sequences
>
> Dear Seqfans,
>
> I've come across A036672, A014236, I'm having a hard time
> understanding which molecules are counted. Can someone explain me what
> those sequences are exactly?
> I think I could better understand it if someone could show me which
> ones are counted in the case of 4 carbon atoms.
> thanks in advance,
>
> Natan Consigli
>
> --Seqfan Mailing list - http://list.seqfan.eu/
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
>


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