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 A099719 #9 Jun 25 2017 15:21:24 %S A099719 1,1,7,89,1720,45887,1595192,69438623,3675895762,231400961167, %T A099719 17017734251838,1441193215057543 %N A099719 Consider the family of multigraphs enriched by the species of trees. Sequence gives number of those multigraphs with n arcs. %D A099719 G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. %H A099719 G. Paquin, <a href="/A038205/a038205.pdf">Dénombrement de multigraphes enrichis</a>, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission] %K A099719 nonn %O A099719 0,3 %A A099719 _N. J. A. Sloane_, Oct 26 2004