[seqfan] Re: Toothpick sequences (again) (from Richard Mathar by way of admin)

franktaw at netscape.net franktaw at netscape.net
Thu Jun 4 07:49:25 CEST 2009

I haven't checked in detail, but I suspect what is happening is a 
rotation of axes.  The first toothpick is oriented with the x axis.  
Then ones are placed on its ends, aligned with the y axis.  The third 
generation is aligned with the z axis, and then it loops back to the x 
axis.  As before, a toothpick is only placed when there is a single end 
at a point, not when there are two meeting there (more than two is 

Franklin T. Adams-Watters

-----Original Message-----
From: Benoît Jubin <benoit.jubin at gmail.com>

On Tue, Jun 2, 2009 at 8:03 AM, Olivier Gerard 
<olivier.gerard at gmail.com> wrote:
> From Richard Mathar:
> Benoit wrote in 
> bj> Benoît Jubin benoit.jubin at gmail.com
> bj> Thu May 28 02:34:32 CEST 2009
> bj> ...
> bj> Does anyone know the definitions used for the "3d toothpick 
> bj> A160160, A160161, A160120, A160121, A160170, A160171?
> bj>
> bj> The author is in copy to this email, and I'd like to politely 
> bj> him that submissions are not "guess-my-sequence" puzzles.
> bj> ...
> ...
> Basically A160160, A160170, A160408 remain completely obscure also to 

For me too, as well as A160120.  Anyone?

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