[seqfan] Re: A220952 "unkn" (author Don Knuth, Feb 20, 2013) - continuation?

Neil Sloane njasloane at gmail.com
Fri Aug 25 01:50:24 CEST 2017

I'm a bit skeptical that that is the correct explanation

The way the sequence was entered suggests that Don Knuth
proposed it as a problem in some journal,
and so did not want to give the explanation before
the solution appeared in the journal.

Presumably when the journal appears, someone
will make the connection with the OEIS entry.

Best regards

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 Thu, Aug 24, 2017 at 5:50 PM, Georg.Fischer
<georg.fischer at t-online.de> wrote:
> Dear Neil, dear SeqFans,
> It seems to me that sequence A220952 never has received any comment.
> Maybe Neil knows more.
> I think that a(n=0..125) should read:
> 1, 2,3,4,9, 14,19,18,17,16,11,12,13,8,7,6,5,10,15,20,21,22,23,24,
> 49,74,99,98,97,96,95,90,85,80,81,82,83,88,87,86,91,92,93,94,89,84,79,78,77,76,51,
> 52,53,54,59,64,69,68,67,66,61,62,63,58,57,56,55,60,65,70,71,72,73,48,47,46,45,40,
> 35,30,31,32,33,38,37,36,41,42,43,44,39,34,29,28,27,26,25,50,75,100,101,102,103,104,
> 109,114,119,118,117,116,111,112,113,108,107,106,105,110,115,120,121,122,123,124,
> 249
> Please have a look at my page
> <http://www.teherba.org/index.php/OEIS/A220952> where
> you find some explanations and links to the plots which
> show letter "Z" shaped structures in kind of "fractal"
> nesting.
> I do not dare to add a comment to the sequence until
> somebody finds this reasonable. If my continuation is
> the desired one, I would of cause be very interested in
> additional interpretations.
> Best regards - Georg Fischer
> --
> Seqfan Mailing list - http://list.seqfan.eu/

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