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 A007174 M2679 #14 Oct 13 2015 01:38:14 %S A007174 1,1,1,3,7,20,131,815,5142,36800,272093,2077909,16176607,127997683, %T A007174 1025727646,8310377815,68217725764,560527576100,4556993996246 %N A007174 Erroneous version of A182322. %K A007174 dead %O A007174 1,4