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 A099692 #13 Jan 12 2021 19:51:12
%S A099692 1,1,4,23,220,3016,55011,1265824,35496711,1183686987,46072834777,
%T A099692 2062557088117,104926356851165,6004962409831577,383331023991407286,
%U A099692 27094756978689827593,2107021273883402908850,179261681391054814324774,16602830645109035036038335
%N A099692 Consider the family of multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled edges.
%D A099692 G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
%H A099692 Andrew Howroyd, <a href="/A099692/b099692.txt">Table of n, a(n) for n = 0..100</a>
%H A099692 G. Paquin, <a href="/A038205/a038205.pdf">Dénombrement de multigraphes enrichis</a>, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004. [Cached copy, with permission]
%F A099692 E.g.f.: B(2*exp(x) - x - 2) where B(x) is the e.g.f. of A014500. - _Andrew Howroyd_, Jan 12 2021
%o A099692 (PARI) \\ R(n) is e.g.f. of 1,1,2,2,2,2,...; EnrichedGnSeq defined in A098620.
%o A099692 R(n)={2*exp(x + O(x*x^n)) - x - 1}
%o A099692 EnrichedGnSeq(R(20)) \\ _Andrew Howroyd_, Jan 12 2021
%Y A099692 Cf. A000110, A014500, A098620, A099693, A099694, A099695.
%K A099692 nonn
%O A099692 0,3
%A A099692 _N. J. A. Sloane_, Oct 26 2004
%E A099692 Terms a(11) and beyond from _Andrew Howroyd_, Jan 12 2021