A058488 Total number of interior nodes in all essentially parallel series-parallel networks with n unlabeled edges, multiple edges not allowed.

0, 0, 1, 4, 10, 30, 78, 217

Offset

0,4

Links

Table of n, a(n) for n=0..7.

J. W. Moon, Some enumerative results on series-parallel networks, Annals Discrete Math., 33 (1987), 199-226 (the sequence I_q(n)*q_pi Table 2).

Index entries for sequences mentioned in Moon (1987)

Formula

Reference gives g.f.

Crossrefs

Cf. A058494, A058495.

Sequence in context: A222807 A090578 A007713 * A036674 A006357 A114946

Adjacent sequences: A058485 A058486 A058487 * A058489 A058490 A058491

Keyword

nonn,nice,more

Author

N. J. A. Sloane, Dec 20 2000

Status

approved