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 A058478 #5 Mar 30 2012 16:48:55 %S A058478 0,0,1,5,46,534,7596,127756,2479856,54560512,1341716960,36468949824, %T A058478 1085680795200,35131589529152,1227777836217856,46086892351150592, %U A058478 1849266301464495616,78990342571085637120,3578513340735623076864 %N A058478 Total number of interior nodes in all essentially series series-parallel networks with n labeled edges, multiple edges allowed. %D A058478 J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the e.g.f. I_S(x)). %H A058478 <a href="/index/Mo#Moon87">Index entries for sequences mentioned in Moon (1987)</a> %F A058478 E.g.f. = (xP'-P)/(1+U), where P = e.g.f. for A000311 and U that for A006351. %Y A058478 A058480 = A058478 + A058479. %K A058478 nonn %O A058478 0,4 %A A058478 _N. J. A. Sloane_, Dec 20 2000