A058477 Total number of multiple edges in all essentially series series-parallel networks with n labeled edges, multiple edges allowed.

0, 0, 0, 3, 20, 225, 3074, 50365, 958880, 20786745, 505233986, 13603353929, 401819713272, 12917450788957, 448922610588490, 16770152528046333, 670096317408222528, 28517474585339343409, 1287722135213121579202

Offset

0,4

References

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

Links

Table of n, a(n) for n=0..18.

Index entries for sequences mentioned in Moon (1987)

Formula

E.g.f. = e.g.f. for A058476 - (exp(-x)-1+x).

Crossrefs

Sequence in context: A307363 A052851 A262233 * A119758 A108527 A194972

Adjacent sequences: A058474 A058475 A058476 * A058478 A058479 A058480

Keyword

nonn

Author

N. J. A. Sloane, Dec 20 2000

Status

approved