A058494 Total number of interior nodes in all essentially parallel series-parallel networks with n unlabeled edges, multiple edges allowed.

0, 0, 1, 6, 20, 74, 245, 845

Offset

0,4

References

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

Links

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

Index entries for sequences mentioned in Moon (1987)

Formula

Reference gives g.f.

Crossrefs

Cf. A058488, A058495.

Sequence in context: A028402 A092760 A240043 * A147979 A330245 A118265

Adjacent sequences: A058491 A058492 A058493 * A058495 A058496 A058497

Keyword

nonn,nice,more

Author

N. J. A. Sloane, Dec 20 2000

Status

approved