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 A062500 #3 May 11 2007 03:00:00 %S A062500 1,1,118,13983,48667074,13055867207,232630103648534,144115171092292831 %N A062500 Duplicate of A007965. %K A062500 dead %O A062500 1,3