A054915 - OEIS

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A054915

Number of unlabeled connected graphs with n nodes such that complement is also connected.

1, 0, 0, 1, 8, 68, 662, 9888, 247492, 11427974, 994403266, 163028488360, 50169784370486, 28952819268460634, 31368276315718175152, 63938104521922794457626, 245807799210635120355337360 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,5`
	LINKS	`V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.`
	FORMULA	`2*A001349(n)-A000088(n).`
	CROSSREFS	`Sequence in context: A163307 A152105 A068766 * A073555 A167859 A113357` `Adjacent sequences: A054912 A054913 A054914 * A054916 A054917 A054918`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 23 2000`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jul 17 2000`

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Last modified February 15 12:25 EST 2012. Contains 205786 sequences.