A094655 Number of unlabeled 11-gonal 2-trees with n 11-gons.

1, 1, 1, 6, 46, 636, 10527, 194997, 3823327, 78118107, 1646300388, 35570427615, 784467060622, 17601062294302, 400750115756742, 9240636709048733, 215435023547580882, 5071520482516388865, 120417032326341878672, 2881134828445365441407, 69410468220307148620226

Offset

0,4

Links

Andrew Howroyd, Table of n, a(n) for n = 0..200

G. Labelle, C. Lamathe and P. Leroux, Labeled and unlabeled enumeration of k-gonal 2-trees, arXiv:math/0312424 [math.CO], Dec 23 2003.

Crossrefs

Column k=11 of A340811.

Cf. A054581.

Sequence in context: A232058 A331704 A275031 * A327364 A015865 A276271

Adjacent sequences: A094652 A094653 A094654 * A094656 A094657 A094658

Keyword

nonn

Author

Vladeta Jovovic, Jun 06 2004

Extensions

Terms a(19) and beyond from Andrew Howroyd, Feb 02 2021

Status

approved