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 A120448 #2 Mar 30 2012 17:25:49 %S A120448 0,3,17,14,92,60,316,175,814,495,2323,1402,6037,3113,12851,6200,24710, %T A120448 11851,46152,18123,72151,18007,74547,8970,40141 %N A120448 Number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons. %C A120448 See Table 4 column 9 on page 615 of the paper by Caporossi and Hansen. Also the sequence starts for the hydrocarbon C_(54)H_(18). %D A120448 G. Caporossi and P. Hansen, "Enumeration of Polyhex Hydrocarbons to h=21", J. Chem. Inf. Comput. Sci., vol. 38 (1998) pp. 610-619. %e A120448 If the number of carbons is 56 then the number of isomers of polyhex hydrocarbons with C_(2v) symmetry with nineteen hexagons is 17 which is the third term in the sequence. %Y A120448 Cf. A018190. %K A120448 nonn %O A120448 54,2 %A A120448 _Parthasarathy Nambi_, Aug 27 2006