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 A279207 #11 Dec 23 2016 17:31:58 %S A279207 1,2,5,18,102,817,7641 %N A279207 Number of analytic chord diagrams with n chords. %H A279207 Étienne Ghys, <a href="http://arxiv.org/abs/1612.06373">A Singular Mathematical Promenade</a>, arXiv:1612.06373 [math.AG], 2016. See p. 252. %Y A279207 Cf. A007769, A054499, A279208. %K A279207 nonn,more %O A279207 1,2 %A A279207 _N. J. A. Sloane_, Dec 23 2016