A058479 - OEIS

A058479

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

0, 0, 0, 3, 32, 410, 6164, 107492, 2140368, 47990784, 1197523456, 32930028736, 989647215424, 32276598717376, 1135501305508608, 42865272243657216, 1728443263014370304, 74145986811618564608, 3371731055491925101568

(list; graph; refs; listen; history; text; internal format)

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. I_P(x)).

LINKS

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

Index entries for sequences mentioned in Moon (1987)

FORMULA

E.g.f. = product of e.g.f.'s for A006351 and A058478.

CROSSREFS

A058480 = A058478 + A058479.

Sequence in context: A300366 A231591 A123336 * A264334 A278069 A370462

Adjacent sequences: A058476 A058477 A058478 * A058480 A058481 A058482

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 20 2000

STATUS

approved