id:A055278 - OEIS Search Results

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Number of rooted trees with n nodes and 3 leaves.

+0
2

1, 3, 8, 18, 35, 62, 103, 161, 241, 348, 487, 664, 886, 1159, 1491, 1890, 2364, 2922, 3574, 4329, 5198, 6192, 7322, 8600, 10039, 11651, 13450, 15450, 17665, 20110, 22801, 25753, 28983, 32508, 36345, 40512, 45028, 49911, 55181, 60858, 66962 (list; graph; listen)

	OFFSET	`4,2`
	LINKS	`Index entries for sequences related to rooted trees`
	FORMULA	`G.f.: x^4(x^3+x^2+1)/[(1-x^2)(1-x^3)(1-x)^3] (conjectured). - Ralf Stephan, Mar 07 2004`
	CROSSREFS	`Column 3 of A055277.` `Sequence in context: A075342 A083726 A081489 this_sequence A036628 A004035 A000234` `Adjacent sequences: A055275 A055276 A055277 this_sequence A055279 A055280 A055281`
	KEYWORD	`nonn`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), May 09 2000`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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