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 A126146 #3 Mar 30 2012 17:39:18 %S A126146 97,88,72,49,26 %N A126146 Unknown. %C A126146 Possibly an erroneous version of A112667? - _R. J. Mathar_, Apr 04 2007 %K A126146 nonn,unkn %O A126146 1,1 %A A126146 Varun Mehta (sinnernerious(AT)hotmail.com), Mar 07 2007