id:A055328 - OEIS Search Results

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Number of rooted identity trees with n nodes and 3 leaves.

+0
4

1, 5, 13, 28, 53, 91, 146, 223, 326, 461, 634, 851, 1119, 1446, 1839, 2307, 2859, 3504, 4252, 5114, 6100, 7222, 8492, 9922, 11525, 13315, 15305, 17510, 19945, 22625, 25566, 28785, 32298, 36123, 40278, 44781, 49651, 54908, 60571, 66661 (list; graph; listen)

	OFFSET	`6,2`
	LINKS	`Index entries for sequences related to rooted trees`
	FORMULA	`G.f.: x^6(2x+1)/[(1-x^2)(1-x^3)(1-x)^3].`
	CROSSREFS	`Column 3 of A055327.` `Sequence in context: A079989 A062480 A027024 this_sequence A027962 A023537 A023653` `Adjacent sequences: A055325 A055326 A055327 this_sequence A055329 A055330 A055331`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), May 12 2000`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research