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 A057433 #1 May 16 2003 03:00:00 %S A057433 1,3,4,14,30,107,318,1106,3671 %N A057433 Erroneous version of A006074. %D A057433 M. Gardner, Mathematical Magic Show. Random House, NY, 1978, p. 151. %K A057433 dead %O A057433 1,2