%I A030227
%S A030227 1,1,2,3,6,10,20,34,70,121,250,441,912,1630,3375,6092,12624,22961,
%T A030227 47616,87136,180811,332549
%N A030227 Number of n-celled polyominoes with bilateral symmetry.
%C A030227 Polyominoes with n cells and at least one line of reflection symmetry. 
               - Joshua Zucker, Mar 08 2008
%Y A030227 Cf. A000105, A006746.
%Y A030227 Sequence in context: A135452 A077027 A030436 this_sequence A061551 A026034 
               A037031
%Y A030227 Adjacent sequences: A030224 A030225 A030226 this_sequence A030228 A030229 
               A030230
%K A030227 nonn
%O A030227 1,3
%A A030227 Dave Wilson