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 A000941 #19 Oct 13 2015 18:11:45 %S A000941 0,0,0,0,2,5,21,58,194,570,1790,5434,16924,52362,163784,512670, %T A000941 1614406,5096314,16150180 %N A000941 Number of free planar polyenoids with n nodes and symmetry point group C_s. %H A000941 S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, <a href="http://dx.doi.org/10.1021/ci00026a012">Enumeration of polyene hydrocarbons: a complete mathematical solution</a>, J. Chem. Inf. Comput. Sci., 35 (1995) 743-751. %H A000941 S. J. Cyvin, J. Brunvoll, E. Brendsdal, B. N. Cyvin and E. K. Lloyd, <a href="/A002057/a002057.pdf">Enumeration of polyene hydrocarbons: a complete mathematical solution</a>, J. Chem. Inf. Comput. Sci., 35 (1995) 743-751. [Annotated scanned copy] %K A000941 nonn,more %O A000941 1,5 %A A000941 E. K. Lloyd (E.K.Lloyd(AT)soton.ac.uk) %E A000941 Added a(16)-a(19) and title improved by _Sean A. Irvine_, Oct 13 2015