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 A033588 #2 Jan 12 2007 03:00:00 %S A033588 0,6,28,66,120,190,276,378,496,630,780,946,1128,1326,1540,1770,2016, %T A033588 2278 %N A033588 Duplicate of A014635. %K A033588 dead %O A033588 0,2