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 A058475 #8 Feb 01 2013 06:47:33
%S A058475 0,0,1,5,41,394,4704,65386,1049754,19032392,385419072,8615947592,
%T A058475 210831826952,5604404196832,160834760288864,4955867959526784,
%U A058475 163197046787269792,5719576163352685696,212565832527352216928,8350117027586731306848
%N A058475 Total number of interior nodes in all series-parallel networks with n labeled edges, multiple edges not allowed.
%D A058475 J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the sequence I_V(n)*Q_pi).
%H A058475 <a href="/index/Mo#Moon87">Index entries for sequences mentioned in Moon (1987)</a>
%F A058475 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 A058475 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); CoefficientList[ Series[ev, {x, 0, max}], x]*Range[0, max]! (* _Jean-François Alcover_, Feb 01 2013 *)
%K A058475 nonn,nice,easy
%O A058475 0,4
%A A058475 _N. J. A. Sloane_, Dec 20 2000