A082938 - OEIS

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A082938

Number of solid 2-trees with 2n+1 edges.

1, 1, 1, 2, 5, 13, 49, 201, 940, 4643, 24037, 127859, 696365, 3858759, 21704863, 123619126, 711787259, 4137614454, 24256010068, 143271593982, 852001881614, 5097719884665, 30670572676389, 185466705697057 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	LINKS	`M. Bousquet and C. Lamathe, Enumeration of solid trees according to edge number and edge degree distribution, Discr. Math., 298 (2005), 115-141.`
	FORMULA	`a(n) = (A047749(n)+A054423(n))/2. - Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 11 2004`
	CROSSREFS	`Sequence in context: A194635 A067021 A098716 * A059103 A112836 A105905` `Adjacent sequences: A082935 A082936 A082937 * A082939 A082940 A082941`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), May 26 2003`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 11 2004`

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Last modified February 17 07:27 EST 2012. Contains 205998 sequences.