%I A005963 M1969
%S A005963 0,0,1,2,10,45,210,1002,4883,23797,116518,571471
%N A005963 Number of restricted hexagonal polyominoes with n cells.
%D A005963 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A005963 A. T. Balaban, Enumeration of Cyclic Graphs, pp. 63-105 of A. T. Balaban, 
               ed., Chemical Applications of Graph Theory, Ac. Press, 1976; see 
               p. 75.
%Y A005963 Equals A000228 - A002216.
%Y A005963 Cf. A036359, A002216, A005963, A000228, A001998.
%Y A005963 Sequence in context: A145239 A068561 A068484 this_sequence A140588 A137334 
               A080643
%Y A005963 Adjacent sequences: A005960 A005961 A005962 this_sequence A005964 A005965 
               A005966
%K A005963 nonn
%O A005963 1,4
%A A005963 N. J. A. Sloane (njas(AT)research.att.com).