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A058353 n*A000084(n). 5
1, 4, 12, 40, 120, 396, 1260, 4176, 13788, 46240, 155496, 527160, 1792804, 6125028, 20986020, 72117632, 248396792, 857402748, 2964896876, 10269550040, 35622420288, 123727866768, 430254861944, 1497796242288, 5219231003500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Z. A. Lomnicki, Two-terminal series-parallel networks, Adv. Appl. Prob., 4 (1972), 109-150.

LINKS

Table of n, a(n) for n=1..25.

CROSSREFS

Cf. A000084, A006349, A006350, A058351, A058352, A000669.

Sequence in context: A248325 A265127 A056274 * A104525 A126986 A090576

Adjacent sequences:  A058350 A058351 A058352 * A058354 A058355 A058356

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 16 2000

STATUS

approved

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Last modified February 17 22:32 EST 2018. Contains 299297 sequences. (Running on oeis4.)