typo in A002215 - restricted

Joshua Zucker joshua.zucker at gmail.com
Sat Mar 8 00:54:14 CET 2008


Looks like A002215 is indeed "tree-like":
  http://tinyurl.com/yoem9h

--Joshua


On Fri, Mar 7, 2008 at 3:37 PM, Tanya Khovanova
<mathoflove-seqfan at yahoo.com> wrote:
> Dear SeqFans,
>
>  A002215 Number of polyhexes with n hexagons, having reflectional
>  symmetry.
>
>  Sounds the same as
>  A030225 Number of n-celled polyhexes (hexagonal polyominoes) with
>  bilateral symmetry.
>
>  Looking at comments, A002215 might be not about all polyhexes but about
>  restricted or tree-like. I do not know what restricted means, so
>  someone should suggest the right name for this sequence.
>
>  Best, Tanya
>
>
>





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