This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A123142 #3 Mar 30 2012 17:25:50 %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, %U A123142 373411,1536669,305586,1298746,129710,586556 %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. %K A123142 nonn %O A123142 64,1 %A A123142 _Parthasarathy Nambi_, Oct 01 2006