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 A069599 #5 Apr 07 2014 13:31:06 %S A069599 11,127,1123,1423,112543,1124653,1234657,112345687,1234156789, %T A069599 10124356789 %N A069599 Duplicate of A088628. %K A069599 dead %O A069599 1,1