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 A058476 #5 Mar 30 2012 16:48:55 %S A058476 0,0,1,2,21,224,3075,50364,958881,20786744,505233987,13603353928, %T A058476 401819713273,12917450788956,448922610588491,16770152528046332, %U A058476 670096317408222529,28517474585339343408,1287722135213121579203 %N A058476 Total number of multiple edges in all essentially parallel series-parallel networks with n labeled edges, multiple edges allowed. %D A058476 J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the sequence M_P(n)*P_pi). %H A058476 <a href="/index/Mo#Moon87">Index entries for sequences mentioned in Moon (1987)</a> %F A058476 E.g.f. = (exp(-x)-1+x)*P'(x), where P(x) = e.g.f. for A000311. %K A058476 nonn %O A058476 0,4 %A A058476 _N. J. A. Sloane_, Dec 20 2000