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 A145098 #11 Jan 16 2016 20:34:41 %S A145098 89,178481,2089,616318177,164511353,2099863,13264529,20394401, %T A145098 3203431780337,761838257287,212885833,9361973132609 %N A145098 Duplicate of A136031. %K A145098 dead %O A145098 1,1