A058488 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A058488

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

2

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

(list; graph; refs; listen; history; text; internal format)

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