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A058495 Total number of multiple edges in all essentially parallel series-parallel networks with n unlabeled edges, multiple edges allowed. 0
0, 1, 2, 5, 15, 47, 149, 489 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

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

Sequence in context: A148362 A143094 A308274 * A287275 A151280 A149914

Adjacent sequences:  A058492 A058493 A058494 * A058496 A058497 A058498

KEYWORD

nonn,easy,nice,more

AUTHOR

N. J. A. Sloane, Dec 20 2000

STATUS

approved

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Last modified October 18 12:18 EDT 2019. Contains 328160 sequences. (Running on oeis4.)