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 A211954 #7 Nov 08 2013 23:36:29 %S A211954 6,16,74,336,1474,6560,28861,128720,578033,2624460 %N A211954 Number of distinct finite languages over 4-ary alphabet, whose minimum regular expression has ordinary length n. %H A211954 Hermann Gruber, Jonathan Lee, and Jeffrey Shallit, <a href="http://arxiv.org/abs/1204.4982">Enumerating regular expressions and their languages</a>, arXiv:1204.4982v1 [cs.FL] %K A211954 nonn,hard %O A211954 1,1 %A A211954 _Hermann Gruber_, Apr 26 2012