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 A159577 #10 Oct 02 2011 13:10:26 %S A159577 3,125970,44618574,1050274875,835668708875,87740042053973197350, %T A159577 249875247243953981660010,958593992854426686094086750, %U A159577 28077829144670491508241956182896750 %N A159577 Erroneous version of A116536. %K A159577 dead %O A159577 1,1