%I A123142
%S A123142 2,9,33,38,235,124,704,435,2283,1437,6954,3628,17864,9528,43798,24237,
%T A123142 106293,53593,228216,104754,431864,188701,760883,300925,1212591,373411,
%U A123142 1536669,305586,1298746,129710,586556
%N A123142 Number of benzenoids with 23 hexagons, C_(2v) symmetry and containing 
               n carbon atoms.
%D A123142 G. Brinkmann, G. Caporossi and P. Hansen, "A Survey and New Results on 
               Computer Enumeration of Polyhex and Fusene Hydrocarbons", J. Chem. 
               Inf. Comput. Sci., vol. 43 (2003) 842-851. See Table 6 column 7 on 
               page 847.
%e A123142 If n=64 then the number of benzenoids with 23 hexagons with C_(2v) symmetry 
               is 2.
%e A123142 If n=65 then the number of benzenoids with 23 hexagons with C_(2v) symmetry 
               is 9.
%e A123142 If n=66 then the number of benzenoids with 23 hexagons with C_(2v) symmetry 
               is 33.
%e A123142 If n=67 then the number of benzenoids with 23 hexagons with C_(2v) symmetry 
               is 38.
%e A123142 If n=94 then the number of benzenoids with 23 hexagons with C_(2v) symmetry 
               is 586556.
%Y A123142 Cf. A122539, A121964, A122736, A123044, A123106, A123105, A123104.
%Y A123142 Sequence in context: A036505 A056916 A139628 this_sequence A122097 A073400 
               A048498
%Y A123142 Adjacent sequences: A123139 A123140 A123141 this_sequence A123143 A123144 
               A123145
%K A123142 nonn
%O A123142 64,1
%A A123142 Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Oct 01 2006