A123404 - OEIS

A123404

Number of alternately colorable perfect graphs on n nodes.

1, 2, 4, 11, 32, 136, 749, 6142, 71759, 1174550 (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: A123434 A123424 A123449 * A178925 A298445 A294224` `Adjacent sequences: A123401 A123402 A123403 * A123405 A123406 A123407`
	KEYWORD	`nonn,more`
	AUTHOR	`N. J. A. Sloane, Oct 18 2006`
	STATUS	`approved`

Last modified April 1 19:13 EDT 2023. Contains 361695 sequences. (Running on oeis4.)