[seqfan] Re: Seqfan Digest, Vol 36, Issue 1

William Keith william.keith at gmail.com
Tue Sep 6 21:01:32 CEST 2011


On Tue, Sep 6, 2011 at 7:44 PM, Peter Lawrence <peterl95124 at sbcglobal.net>wrote:

> Neil,
>        sequence of all possible lists over the letters "0", "1", "2",
>         such that within a list no two adjacent letters are the same,
>        firstly sorted by length of list,
>        secondly lists of same length sorted lexicographically.
>

I believe this should rather be, no two adjacent segments of any length.
You'll note that {1,2,1,2} also does not appear.

>
> -Peter Lawrence.
>

William J. Keith



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