A287886 Unrooted labeled Ptolemaic graphs on n nodes.

1, 1, 4, 35, 481, 9042, 216077, 6271057, 214248958, 8424002973, 374708368981, 18604033129948, 1019915376831963, 61193614838857217

Offset

1,3

Links

Table of n, a(n) for n=1..14.

Maryam Bahrani and Jérémie Lumbroso, Enumerations, Forbidden Subgraph Characterizations, and the Split-Decomposition, arXiv:1608.01465 [math.CO], 2016.

Falk Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 29e68fa.

Crossrefs

Sequence in context: A367923 A242795 A349527 * A342207 A224797 A143669

Adjacent sequences: A287883 A287884 A287885 * A287887 A287888 A287889

Keyword

nonn,more

Author

N. J. A. Sloane, Jun 21 2017

Extensions

a(14) added using tinygraph by Falk Hüffner, Nov 16 2020

Status

approved