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 A090952 #2 Feb 24 2006 03:00:00 %S A090952 3,5,11,17,101,137,179,191,419,809,821 %N A090952 Erroneous version of A053778. %K A090952 dead %O A090952 0,1