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 A038267 #4 May 11 2007 03:00:00 %S A038267 1,7,1,49,14,1,343,147,21,1,2401,1372,294,28,1,16807,12005,3430 %N A038267 Duplicate of A027466. %K A038267 dead %O A038267 0,2