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 A213429 N0629 #11 Dec 28 2013 22:23:14 %S A213429 1,2,6,16,50,144,448,7472,17676,41600 %N A213429 Erroneous version of A000136. %C A213429 Included in accordance with OEIS policy of including published but erroneous sequences, to serve as pointers to the correct versions. %D A213429 M. A. Sainte-Laguë, Les Réseaux (ou Graphes), Mémorial des Sciences Mathématiques, Fasc. 18, Gauthier-Villars, Paris, 1926, p. 41. %D A213429 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %K A213429 dead %O A213429 1,2 %A A213429 _N. J. A. Sloane_, Jun 11 2012