A058495 - OEIS

%I #8 May 19 2021 00:17:49

%S 0,1,2,5,15,47,149,489

%N Total number of multiple edges in all essentially parallel series-parallel networks with n unlabeled edges, multiple edges allowed.

%D 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 <a href="/index/Mo#Moon87">Index entries for sequences mentioned in Moon (1987)</a>

%F Reference gives g.f.

%Y Cf. A058488, A058494.

%K nonn,nice,more

%O 0,3

%A _N. J. A. Sloane_, Dec 20 2000