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 A081191 #3 May 11 2007 03:00:00 %S A081191 1,9,82,756,7048,66384,631072,6048576,58388608,567108864,5536870912 %N A081191 Duplicate of A060531. %K A081191 dead %O A081191 0,2