A094654 Number of unlabeled 10-gonal 2-trees with n 10-gons.

1, 1, 1, 6, 39, 482, 7053, 117399, 2070289, 38097139, 723169329, 14074851642, 279609377638, 5651139037570, 115901006038377, 2407291353219949, 50553753543016719, 1071971262516091572, 22926544048209731554, 494103705426160765546, 10722146465907412669810

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=10 of A340811.

Cf. A054581.

Sequence in context: A280006 A336291 A034661 * A145001 A263955 A108937

Adjacent sequences: A094651 A094652 A094653 * A094655 A094656 A094657

Keyword

nonn

Author

Vladeta Jovovic, Jun 06 2004

Extensions

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

Status

approved