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 A074387 #3 May 11 2007 03:00:00 %S A074387 1,81,400,32400,1705636,3648100,138156516,295496100,1055340196, %T A074387 1476326929 %N A074387 Duplicate of A008848. %K A074387 dead %O A074387 1,2