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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
CROSSREFS
Sequence in context: A265127 A056274 A335806 * A104525 A126986 A341990
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 16 2000
STATUS
approved

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Last modified April 22 05:00 EDT 2024. Contains 371887 sequences. (Running on oeis4.)