A058477 - OEIS

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

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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