[seqfan] Re: A032355 extension

Neil Sloane njasloane at gmail.com
Sat Apr 19 17:31:42 CEST 2014


OK, I finished going through that web site. Allan, thanks for finding it!
I extended A032355 and added a b-file.

There were two existing sequences that they mention, although without
referencing the OEIS.

A059282 was one of them, and it turns out that had an error,
which took a while to track down, since all the links were broken. I
corrected the error and the links and created a b-file.

A003050 is a classic sequence from number theory which also appears in
their main table (see the Dihedrant column). Their values agree with the
b-file for that sequence, which is a partial check that their work is
correct!

Then I also added new sequences A241159-A241165
(some with b-files) based on their tables.




On Sat, Apr 19, 2014 at 10:54 AM, Wouter Meeussen <
wouter.meeussen at telenet.be> wrote:

> ok, I stop.
>
> W.
>
> -----Original Message----- From: Neil Sloane
> Sent: Saturday, April 19, 2014 4:32 PM
>
> To: Sequence Fanatics Discussion list
> Subject: [seqfan] Re: A032355 extension
>
>
> I did it. I'm working on the other tables in that web site, but there are
> some problems.
> To be continued.
>
>
> On Sat, Apr 19, 2014 at 10:23 AM, Wouter Meeussen <
> wouter.meeussen at telenet.be> wrote:
>
>   Somebody should do it:
>>
>>>
>>>>
>>>  I'm on to it
>>
>> Wouter.
>>
>> -----Original Message----- From: Allan Wechsler Sent: Friday, April 18,
>> 2014 9:53 PM To: Sequence Fanatics Discussion list Subject: [seqfan]
>> A032355 extension
>> https://oeis.org/A032355 counts the number of graphs (up to isomorphism)
>> on
>> 2N vertices that are 3-regular ("cubic") and vertex-transitive.
>>
>> It only gives values up to N=20 (V=40). But
>> http://www.matapp.unimib.it/~spiga/census.html gives values up to V=1280
>> (N=640), though not in a super-convenient format. It's a complete census
>> of
>> all the graphs in question. I pulled out the next ten values (up through
>> N=30, V=60). I stopped myself from writing a script to pull out all the
>> values to create a B-file, but I estimate that this is about an hour's
>> work.  Somebody should do it: I want to see the scatterplot.
>>
>> _______________________________________________
>>
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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.
> Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
> Phone: 732 828 6098; home page: http://NeilSloane.com
> Email: njasloane at gmail.com
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>



-- 
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.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com



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