

A309116


a(n) = number of cographs on n points.


0




OFFSET

2,2


COMMENTS

See Haas p. 57 for a note on the nomenclature "cograph".
Haas, Table 1.1 (p. 3) contains the following approximations: a(6) = 1.97 * 10^6, a(7) = 9.43 * 10^10, a(8) = 1.53 * 10^17, a(9) = 1.05 * 10^25.


LINKS

Table of n, a(n) for n=2..5.
Robert Haas, Cographs, arXiv:1905.12627 [math.GM], 2019, p. 3, 57.


CROSSREFS

Sequence in context: A012764 A219275 A101733 * A094815 A246536 A183248
Adjacent sequences: A309113 A309114 A309115 * A309117 A309118 A309119


KEYWORD

nonn,more


AUTHOR

Michael De Vlieger, Jul 13 2019


STATUS

approved



