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 A099696 #12 Jan 12 2021 19:51:53
%S A099696 1,1,4,25,244,3380,62133,1440382,40673705,1364815169,53415511305,
%T A099696 2402797049419,122751622204827,7051227704802797,451598420376965588,
%U A099696 32013004761567761223,2495936511077175475140,212840593118800653411004,19753575434503894710824531
%N A099696 Consider the family of multigraphs enriched by the species of involutions. Sequence gives number of those multigraphs with n labeled edges.
%D A099696 G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
%H A099696 Andrew Howroyd, <a href="/A099696/b099696.txt">Table of n, a(n) for n = 0..100</a>
%H A099696 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 A099696 E.g.f.: B(R(x)) where B(x) is the e.g.f. of A014500 and 1 + R(x) is the e.g.f. of A000085. - _Andrew Howroyd_, Jan 12 2021
%o A099696 (PARI) \\ R(n) is A000085 as e.g.f.; EnrichedGnSeq defined in A098620.
%o A099696 R(n)={exp(x+x^2/2 + O(x*x^n))}
%o A099696 EnrichedGnSeq(R(20)) \\ _Andrew Howroyd_, Jan 12 2021
%Y A099696 Cf. A000085, A014500, A098620, A099697, A099698, A099699.
%K A099696 nonn
%O A099696 0,3
%A A099696 _N. J. A. Sloane_, Oct 26 2004
%E A099696 Terms a(11) and beyond from _Andrew Howroyd_, Jan 12 2021