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 A099428 #2 Jan 24 2006 03:00:00 %S A099428 0,0,2,3,8,15,30,56,104,189,340,605,1068,1872,3262,5655,9760,16779 %N A099428 Duplicate of A099920. %K A099428 dead %O A099428 0,3