id:A136793 - OEIS Search Results

Search: id:A136793

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Number of unlabeled rooted trees with n 4-colored nodes.

+0
2

4, 16, 104, 752, 5996, 50512, 444256, 4027360, 37383044, 353486320, 3393093696, 32976302800, 323839605124, 3208549483216, 32033691247528, 321955764477936, 3254812520854980, 33075467402453872 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`F. Bergeron, G. Labelle and P. Leroux, Combinatorial Species and Tree-Like Structures, Cambridge, 1998, pg 293 (4.1.60)`
	LINKS	`N. J. A. Sloane, Transforms` `Index entries for sequences related to rooted trees`
	FORMULA	`Shifts left and divides by 4 under EULER transform. a(n) = A136794(n)2 = A052763(n)4.`
	CROSSREFS	`Adjacent sequences: A136790 A136791 A136792 this_sequence A136794 A136795 A136796` `Sequence in context: A074187 A111883 A094637 this_sequence A009630 A131043 A071554`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Jan 21 2008`

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

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