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 A128885 #7 Jan 30 2013 13:54:19 %S A128885 3,2,4,7,14,31,74,175,436,1154,3078,8421,23434 %N A128885 Number of closed orientable irreducible 3-manifolds of complexity n. %D A128885 S. Matveev, Algorithmic Topology and Classification of 3-Manifolds, Springer, 2003. %H A128885 S. Matveev, <a href="http://www.matlas.math.csu.ru">Atlas of 3-manifolds</a>. %K A128885 hard,more,nonn %O A128885 0,1 %A A128885 _Sergei Duzhin_, Apr 19 2007 %E A128885 Term 23434 added by _Sergei Duzhin_, Jan 28 2013