A292099 Number of P_3 chair trees constructed from n chairs.

1, 2, 9, 43, 242, 1437, 9058, 59062, 396207, 2713848, 18906784, 133534659, 953964640, 6881027743, 50044650836

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Isaac B. Michael and M. R. Sepanski, Net regular signed trees, Australasian Journal of Combinatorics, Volume 66(2) (2016), 192-204.

Crossrefs

Sequence in context: A055824 A334680 A324619 * A020113 A345414 A272199

Adjacent sequences: A292096 A292097 A292098 * A292100 A292101 A292102

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 11 2017

Status

approved