[seqfan] Re: A139250 Question

Neil Sloane njasloane at gmail.com
Thu Mar 15 09:39:39 CET 2018


M Hutchins said

"
There it says "By carefully keeping track of the toothpicks at each stage,
we figured out a way to generate all the numbers in the ‘toothpick
sequence’ using previously calculated numbers. This means, we found a
recursive pattern in the sequence of numbers."."

Me:  yes, that is correct, why do you doubt it?  The article you should
read is this:

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence
and Other Sequences from Cellular Automata
<http://neilsloane.com/doc/tooth.pdf>, which is also available at
arXiv:1004.3036v2 <http://arxiv.org/abs/1004.3036>

(There are two links to different copies of the same article)



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 Wed, Mar 14, 2018 at 6:16 PM, P. Michael Hutchins <pmh232 at gmail.com>
wrote:

> A139250 has a link, http://boisemathcircles.org/bmc-sessions/toothpicks.
>
> There it says "By carefully keeping track of the toothpicks at each stage,
> we figured out a way to generate all the numbers in the ‘toothpick
> sequence’ using previously calculated numbers. This means, we found a
> recursive pattern in the sequence of numbers.".
>
> Is that in fact the case?
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
>


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