id:A038061 - OEIS Search Results

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a(n) = 3^n*n^(n-1).

+0
2

3, 18, 243, 5184, 151875, 5668704, 257298363, 13759414272, 847288609443, 59049000000000, 4594736955793347, 394865111526801408, 37144672966729275363, 3796313155316599873536, 418886580596209716796875 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Labeled rooted trees with 3-colored nodes.`
	LINKS	`Index entries for sequences related to rooted trees`
	FORMULA	`E.g.f. B(3x) where B(x) is e.g.f. of A000169.`
	CROSSREFS	`Cf. A000169, A038055-A038062.` `Sequence in context: A071605 A137223 A159640 this_sequence A128775 A102100 A083000` `Adjacent sequences: A038058 A038059 A038060 this_sequence A038062 A038063 A038064`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jan 04 1999.`
	EXTENSIONS	`New description from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 08 2003`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research