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 A006826 M2469 #5 Jun 01 2010 03:00:00 %S A006826 1,3,5,10,30,210,16353 %N A006826 Erroneous version of A003182. %D A006826 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %K A006826 dead %O A006826 0,2