A123549 - OEIS

This site is supported by donations to The OEIS Foundation.

A123549

Number of unlabeled connected bicolored graphs on 2n nodes which are invariant when the two color classes are interchanged.

1, 2, 7, 36, 265, 3039, 56532 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`R. W. Robinson, Numerical implementation of graph counting algorithms, AGRC Grant, Math. Dept., Univ. Newcastle, Australia, 1978.`
	CROSSREFS	`Row sums of A123550.` `Sequence in context: A143805 A112293 A090352 * A009704 A141308 A185161` `Adjacent sequences: A123546 A123547 A123548 * A123550 A123551 A123552`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Nov 14 2006`

Content is available under The OEIS End-User License Agreement .

Last modified February 15 16:39 EST 2012. Contains 205823 sequences.