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 A108239 #14 Sep 21 2021 19:17:26 %S A108239 1,1,3,9,43,655,42426,11590894,12561206794 %N A108239 Number of triangulated surfaces with n vertices. %H A108239 F. H. Lutz, <a href="https://arxiv.org/abs/math/0610022">Enumeration and random realization of triangulated surfaces</a>, arXiv:math/0610022 [math.CO], 2006-2007. %H A108239 F. H. Lutz, <a href="https://page.math.tu-berlin.de/~lutz/stellar/">The Manifold Page</a>. %H A108239 T. Sulanke and F. H. Lutz, <a href="https://arxiv.org/abs/math/0610022">Isomorphism free lexicographic enumeration of triangulated surfaces and 3-manifolds</a>, arXiv:math/0610022 [math.CO], 2006-2007. %Y A108239 Cf. A000109. %K A108239 nonn,hard,more,nice %O A108239 4,3 %A A108239 _Ralf Stephan_, Jun 17 2005 %E A108239 a(11)-a(12) from Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 08 2006