[seqfan] Re: Website linked in A242888 and A242889

Ray Chandler rayjchandler at sbcglobal.net
Sun Jun 23 19:28:23 CEST 2019

Go to http://www.jcrystal.com/steffenweber/ and select MS-DOS option.  If you click the "download" link below Tilings 1.2 icon, you can download the program.  

Note: These programs were never designed to run under Windows. You can still run them on Windows Vista/7/8/10 using the free DOS Box emulator.

There are more current Windows programs that may offer similar capability.

> -----Original Message-----
> From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Fred
> Lunnon
> Sent: Sunday, June 23, 2019 8:32 AM
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Subject: [seqfan] Re: Website linked in A242888 and A242889
>   I can view the page at
>     http://www.jcrystal.com/steffenweber/JAVA/jtiling/jtiling.html
> but none of the app buttons appear to be live.
>   There is a link to a PC app at
>     http://www.jcrystal.com/steffenweber/dos/weber12.html
> which offers a download, but that only leads to a Wayback server error.
>   I suggest either trying to contact the author (Steffen Weber), or rolling up
> your sleeves (or those of some handy colleague) to re-implement the
> algorithm.
>   And preferably not in Java.  A sad tale, too often repeated!
> Fred Lunnon
> On 6/23/19, Felix Fröhlich <felix.froe at gmail.com> wrote:
> > Dear SeqFans,
> >
> > when I created A242888 and A242889, I based the data on the
> > illustrations produced by the app on the linked website in these
> > sequences. However, now I can no longer access this app and I suspect
> > this may be due to the app being written for an older version of Java
> (though I may be wrong).
> >
> > Is anyone able to access the website and access the app on that
> > website? If so, could someone use the app to generate the two tilings
> > with 7-fold symmetry, one time with shift (n-1)/2n and one time with
> > shift 1/n? What I want to do is I want to find the substitution rules
> > for generating these two tilings in order to produce illustrations and
> > more terms for these two sequences.
> >
> > I tried in my graphics program to find the substitution rules for the
> > three rhomb tiles of the 7-fold tilings, but failed to achieve this. I
> > believe it would be easier if I had an idea of what the actual patches
> > of tiles surrounding the "Sun" and "Star" in the 7-fold case looked like.
> >
> > If you can make these screenshots as specified above, could you send
> > them to me via E-Mail in an attachement?
> >
> > Best regards
> >
> > Felix
> >
> > --
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
> --
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