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 A058406 #8 Feb 01 2013 06:47:24
%S A058406 0,0,1,2,27,199,2645,34236,560742,9958754,201928954,4480386932,
%T A058406 109410252512,2897637649204,82974026800132,2550731142019568,
%U A058406 83843131420325008,2933465366569951168,108862752438362487648,4270766898251635808800
%N A058406 Total number of interior nodes in all series-parallel networks with n labeled edges, multiple edges not allowed.
%D A058406 J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the sequence I_R(n)*Q_pi).
%H A058406 <a href="/index/Mo#Moon87">Index entries for sequences mentioned in Moon (1987)</a>
%F A058406 Let Q, R = Q-log(1+x), V=Q+R be the e.g.f.'s for A058379, A058380, A058381 resp. E.g.f.'s for A058475, A058406, A058388 are E_V = (V*Q-R)/(1-V), E_R = E_V/(1+V), E_Q = (E_V+V)/(1+V)-Q.
%t A058406 max = 19; q = CoefficientList[ InverseSeries[ Series[-1 + E^(1 + 2*a - E^a), {a, 0, max}], x], x]*Table[x^k, {k, 0, max}] // Total; r = q - Log[1 + x]; v = q + r; ev = (v*q - r)/(1 - v); er = ev/(1 + v); CoefficientList[ Series[er, {x, 0, max}], x]*Range[0, max]! (* _Jean-François Alcover_, Feb 01 2013 *)
%K A058406 nonn,nice,easy
%O A058406 0,4
%A A058406 _N. J. A. Sloane_, Dec 20 2000