typo in A002215 - restricted

Tanya Khovanova mathoflove-seqfan at yahoo.com
Sat Mar 8 00:37:13 CET 2008


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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