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 A048662 #15 Feb 16 2011 12:59:29 %S A048662 2,11,101,181,18181,1008001,1022201,1055501,1082801,1085801,1180811, %T A048662 1208021,1221221,1250521,1280821,1508051,1520251,1551551,1580851, %U A048662 1802081,1805081,1880881,1881881,100111001,100888001,108101801 %N A048662 Erroneous version of A134998. %K A048662 dead %O A048662 1,1