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

Author

N. J. A. Sloane, Dec 20 2000

Keywords

• nonn

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

• Index entries for sequences mentioned in Moon (1987)

Formula

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