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 A026544 #6 May 11 2007 03:00:00 %S A026544 1,3,14,55,231,952,3976,16614,69750,293557,1238952,5240599 %N A026544 Duplicate of A026527. %K A026544 dead %O A026544 2,2