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 A057497 #1 May 16 2003 03:00:00 %S A057497 1,1,1,2,6,17,13,17,30,60,555,990,1616,2168,2467,2648,2294,1892,1283, %T A057497 810 %N A057497 Erroneous version of A008403. %K A057497 dead %O A057497 1,4