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 A091688 #2 Jun 29 2008 03:00:00 %S A091688 1,2,19,8368,360350697981 %N A091688 Number of lattice congruences of the weak order on the Coxeter group B_n. %C A091688 For n=0,1,2,3,4, we have a(n+1) ~ [a(n)]^3 as a very rough order-of-magnitude approximation. %H A091688 N. Reading, <a href="http://arXiv.org/abs/math.CO/0401404">Lattice congruences of the weak order</a>. %Y A091688 Cf. A091687. %K A091688 hard,more,nonn %O A091688 0,2 %A A091688 Nathan Reading (nreading(AT)umich.edu), Jan 28 2004