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 A140762 #4 Oct 02 2011 13:51:36 %S A140762 30,9699690,304250263527210,267064515689275851355624017992790, %T A140762 5766152219975951659023630035336134306565384015606066319856068810, %U A140762 962947420735983927056946215901134429196419130606213075415963491270 %N A140762 Erroneous version of A159578. %K A140762 dead %O A140762 1,1