%I #5 Mar 30 2012 16:48:55

%S 0,0,0,3,32,410,6164,107492,2140368,47990784,1197523456,32930028736,

%T 989647215424,32276598717376,1135501305508608,42865272243657216,

%U 1728443263014370304,74145986811618564608,3371731055491925101568

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

%D J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the e.g.f. I_P(x)).

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

%F E.g.f. = product of e.g.f.'s for A006351 and A058478.

%Y A058480 = A058478 + A058479.

%K nonn

%O 0,4

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