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 A063548 #6 Mar 13 2015 23:58:43 %S A063548 3,16,105,891,7815,77953,819822,9179632 %N A063548 Largest number of straight line crossing-free spanning trees on n points in the plane. %H A063548 O. Aichholzer and H. Krasser, <a href="http://www.ist.tugraz.at/publications/oaich/psfiles/ak-psotd-01.ps.gz">The point set order type data base: a collection of applications and results</a>, pp. 17-20 in Abstracts 13th Canadian Conference on Computational Geometry (CCCG '01), Waterloo, Aug. 13-15, 2001. %Y A063548 Cf. A001764. %K A063548 nonn,nice,hard %O A063548 3,1 %A A063548 _N. J. A. Sloane_, Aug 14 2001