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 A069542 #4 May 11 2007 03:00:00 %S A069542 7,70,133,322,511,700,1015,1141,1204,1330,2023,2212,2401,3031,3220 %N A069542 Duplicate of A063416. %K A069542 dead %O A069542 1,1