[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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