[seqfan] Re: Number of indecomposable permutations sortable using two parallel stacks

Peter Doyle peterdoyle1717 at gmail.com
Fri Dec 13 19:09:46 CET 2013


Yes, that was just a misprint in the name of
https://oeis.org/draft/A215257
It should have been
"Number of indecomposable permutations sortable by a double-ended queue."

Cheers,  Peter

On Fri, Dec 13, 2013 at 10:24 AM, Charles Greathouse
<charles.greathouse at case.edu> wrote:
> Don Knuth points out that
> https://oeis.org/A215252
> and
> https://oeis.org/A215257
> have the same name, and suggests explaining them well enough to distinguish
> the two. Alois P. Heinz suggests that the latter uses a double-ended queue:
> https://oeis.org/draft/A215257
>
> Would anyone familiar with these sequences comment or verify this?
>
> Charles Greathouse
> Analyst/Programmer
> Case Western Reserve University


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