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 A000935 #19 Oct 16 2015 10:00:34
%S A000935 0,1,2,7,20,63,191,598,1870,5906
%N A000935 Number of free planar polyenoids with 2n nodes and symmetry point group C_{2h}.
%H A000935 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 A000935 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 A000935 nonn,more
%O A000935 1,3
%A A000935 E. K. Lloyd (E.K.Lloyd(AT)soton.ac.uk)
%E A000935 a(8)-a(10) and improved title by _Sean A. Irvine_, Oct 15 2015