Search: id:A056878
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%I A056878
%S A056878 0,0,0,0,0,0,1,1,0,1,2,3,3,5,6,14,9,20,20,56,32,80,64,224,114,315,
%T A056878 217,863
%N A056878 Number of polyominoes with n cells, symmetric about diagonal 2.
%D A056878 D. H. Redelmeier, Counting polyominoes: yet another attack, Discrete 
               Math., 36 (1981), 191-203.
%H A056878 Tomas Oliveira e Silva, <a href="http://www.ieeta.pt/~tos/animals.html">
               Enumeration of polyominoes</a>
%H A056878 D. H. Redelmeier, <a href="a056877.png">Table 3</a> of Counting polyominoes...
%Y A056878 Cf. A000105, A001168, A006746, A056877, A006748, A056878, A006747, A006749.
%Y A056878 Sequences classifying polyominoes by symmetry group: A000105, A006746, 
               A006747, A006748, A006749, A056877, A056878, A142886, A144553, A144554.
%Y A056878 Sequence in context: A036803 A018131 A121400 this_sequence A092557 A144680 
               A081493
%Y A056878 Adjacent sequences: A056875 A056876 A056877 this_sequence A056879 A056880 
               A056881
%K A056878 nonn
%O A056878 1,11
%A A056878 N. J. A. Sloane (njas(AT)research.att.com), Sep 03 2000

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