A123450 - OEIS

A123450

Number of preperfect graphs on n nodes.

1, 2, 4, 11, 33, 148, 906, 8887, 136755, 3269254 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..10.` `S. Hougardy, Home Page` `S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.`
	CROSSREFS	`Sequence in context: A123419 A123451 A123470 * A052431 A076316 A304125` `Adjacent sequences: A123447 A123448 A123449 * A123451 A123452 A123453`
	KEYWORD	`nonn,more`
	AUTHOR	`N. J. A. Sloane, Oct 18 2006`
	STATUS	`approved`

Last modified January 30 03:32 EST 2023. Contains 359939 sequences. (Running on oeis4.)