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A094655
Number of unlabeled 11-gonal 2-trees with n 11-gons.
2
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
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
KEYWORD
nonn
AUTHOR
Vladeta Jovovic, Jun 06 2004
EXTENSIONS
Terms a(19) and beyond from Andrew Howroyd, Feb 02 2021
STATUS
approved