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 A125686 #4 Mar 30 2012 17:21:02 %S A125686 1,2,3,6,7,14,19,25,31,62,107,127,255,339,479,639,799 %N A125686 Where records occur in A127885. %Y A125686 Cf. A127885, A125195, A006877. %K A125686 nonn,more %O A125686 1,2 %A A125686 _David Applegate_ and _N. J. A. Sloane_, Feb 06 2007