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 A098638 #15 Jan 12 2021 21:30:41
%S A098638 1,2,13,164,3127,82600,2845775,122820136,6446913953,402413160952,
%T A098638 29343933156485,2464029760993520,235446319553848087,
%U A098638 25346231173047308256,3047931031445529965527,406412844141860523543392,59704680455100785101683457,9608818815170839730520275488
%N A098638 Consider the family of directed multigraphs enriched by the species of odd sets. Sequence gives number of those multigraphs with n labeled loops and arcs.
%D A098638 G. Paquin, Dénombrement de multigraphes enrichis, Mémoire, Math. Dept., Univ. Québec à Montréal, 2004.
%H A098638 Andrew Howroyd, <a href="/A098638/b098638.txt">Table of n, a(n) for n = 0..200</a>
%H A098638 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 A098638 E.g.f.: exp(-1)*Sum_{n>=0}(1+sinh(x))^(n^2)/n!. - _Vladeta Jovovic_, Mar 04 2008
%F A098638 E.g.f.: B(sinh(x)) where B(x) is the e.g.f. of A014507. - _Andrew Howroyd_, Jan 12 2021
%o A098638 (PARI) \\ EnrichedGdlSeq defined in A098622.
%o A098638 EnrichedGdlSeq(sinh(x + O(x*x^20))) \\ _Andrew Howroyd_, Jan 12 2021
%Y A098638 Cf. A014507, A098622, A098636, A098637, A098639.
%K A098638 nonn
%O A098638 0,2
%A A098638 _N. J. A. Sloane_, Oct 26 2004
%E A098638 Missing a(10) inserted and terms a(13) and beyond from _Andrew Howroyd_, Jan 12 2021