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 A028893 #6 May 11 2007 03:00:00 %S A028893 1595,6785,53867,67727,102377,296003,740027,961877,998867,1048817 %N A028893 Duplicate of A029561. %K A028893 dead %O A028893 1,1