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 A111563 #12 May 09 2017 10:56:36 %S A111563 1,1,2,5,13,46,172,777,3783,20074,111604,646409,3846640,23410035, %T A111563 144965988,910898943,5794179218,37248630398,241676806702, %U A111563 1580880366039,10416314047854,69080674190341,460841447382976,3090747326749823 %N A111563 Number of connected outerplanar graphs on n unlabeled nodes. %H A111563 Manuel Bodirsky, Éric Fusy, Mihyun Kang and Stefan Vigerske, <a href="https://arxiv.org/abs/math/0511422">Enumeration of Unlabeled Outerplanar Graphs</a>, arXiv:math/0511422 [math.CO], 2005-2006. %H A111563 S. Vigerske, <a href="http://www.math.hu-berlin.de/~stefan/thesis_enum_outerpl.ps.gz">Asymptotic enumeration of unlabeled outerplanar graphs</a>, Diploma thesis, Humboldt University Berlin, 2005. %H A111563 S. Vigerske, <a href="https://www.math.hu-berlin.de/~stefan/fs_enum_outerpl.pdf">Asymptotic enumeration of unlabeled outerplanar graphs</a>, Slides, Diploma thesis, Humboldt University Berlin, 2005. %H A111563 Stefan Vigerske, <a href="http://www.math.hu-berlin.de/~stefan">Homepage</a> %F A111563 Generating function and cycle index sum known, see Vigerske or Bodirsky, Fusy, Kang and Vigerske. %Y A111563 Cf. A001004, A097998, A098000. %K A111563 nonn %O A111563 1,3 %A A111563 Stefan Vigerske, Nov 17 2005