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 A234940 #9 Jan 08 2014 19:53:29 %S A234940 3,10,19,32,49,77 %N A234940 Erroneous version of A010896. %C A234940 Included in accordance with OEIS policy of listing published but incorrect sequences, with pointers to the correct versions. %D A234940 CRC Handbook of Combinatorial Designs, 1996, p. 315. %K A234940 dead %O A234940 1,1