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 A089218 #2 Jun 29 2008 03:00:00 %S A089218 69593,110651,228647,250889,318919,396449,421913,498271,507431,554317 %N A089218 Erroneous version of A052195. %K A089218 dead %O A089218 1,1