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 A099465 #3 Nov 10 2007 03:00:00 %S A099465 1,0,3,3,9,18,36,81,162,351,729,1539,3240,6804,14337,30132,63423, %T A099465 133407 %N A099465 Duplicate of A099094. %K A099465 dead %O A099465 0,3