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

Hugo Pfoertner yae9911 at gmail.com
Fri Aug 25 13:37:59 CEST 2017


I would like to see Don Knuth's original comment being kept for reasons of
authenticity.

On Fri, Aug 25, 2017 at 1:23 PM, Richard J. Mathar <mathar at mpia-hd.mpg.de>
wrote:

> Referring to http://list.seqfan.eu/pipermail/seqfan/2017-August/
> 017883.html
>
> gf> I think that a(n=0..125) should read:
> gf> 1, 2,3,4,9, 14,19,18,17,16,11,12,13,8,7,6,5,10,15,20,21,22,23,24,
> gf> 49,74,99,98,97,96,95,90...
>
> The solution is not correct because 96 and 95 are not adjacent.
> [96 = 341_5, 95=340_5; the points (3,1) and (3,0) obtained
> by pairing the first and last digits are not adjacent in Knuth's meander
> on 5x5.
>
...



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