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 A000948 #18 Oct 16 2015 03:27:39 %S A000948 0,3,20,99,450,1896,7771,30895,121144,468409,1796584,6841014,25925062 %N A000948 Number of free nonplanar polyenoids with n nodes and symmetry point group C_s. %H A000948 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 A000948 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] %F A000948 a(n) = A000131(n+2) - A000941(n). - _Sean A. Irvine_, Oct 15 2015 %K A000948 nonn,more %O A000948 7,2 %A A000948 E. K. Lloyd (E.K.Lloyd(AT)soton.ac.uk) %E A000948 a(16)-a(19) and title improved by _Sean A. Irvine_, Oct 16 2015