A220826 - OEIS

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A220826

Number of unrooted binary leaf-multi-labeled trees with n leaves on the label set [2].

2, 3, 4, 6, 12, 31, 78, 234, 722, 2376 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..10.` `V. P. Johnson, Enumeration Results on Leaf Labeled Trees, Ph. D. Dissertation, Univ. Southern Calif., 2012.`
	CROSSREFS	`Sequence in context: A275448 A018405 A018419 * A095938 A018460 A018484` `Adjacent sequences: A220823 A220824 A220825 * A220827 A220828 A220829`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane, Dec 22 2012`
	STATUS	`approved`

Last modified January 24 13:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)