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 A243707 #7 Aug 29 2015 04:12:47 %S A243707 4,7,13,97,719725 %N A243707 Bisection A140468(2n+1). %H A243707 Joshua Cooper, Mark Walters, <a href="http://arxiv.org/abs/0807.1549">Iterated point-line configurations grow doubly-exponentially</a>, Discrete Comput. Geom. 43 (2010), no. 3, 554-562. MR2587837 (2011f:51016) 51M04 (52C35). %Y A243707 Cf. A140468, A243708. %K A243707 nonn,more %O A243707 0,1 %A A243707 _N. J. A. Sloane_ and _Doron Zeilberger_, Jun 17 2014