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%I #8 May 19 2021 00:11:34
%S 0,0,1,6,20,74,245,845
%N Total number of interior nodes 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 I_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, A058495.
%K nonn,nice,more
%O 0,4
%A _N. J. A. Sloane_, Dec 20 2000
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