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 A090383 #3 Mar 30 2012 16:49:51 %S A090383 4,7,8,8,10,11,8,12,10,8,10 %N A090383 Minimal number of vertices of polytope P_T associated with any binary tree having 2n+1 nodes. %H A090383 N. Eriksson, <a href="http://arXiv.org/abs/math.CO/0401175">Toric ideals of homogeneous phylogenetic models</a> %Y A090383 Cf. A090381-A090385. %K A090383 nonn,more %O A090383 1,1 %A A090383 _N. J. A. Sloane_, Jan 30 2004