id:A034860 - OEIS Search Results

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n!*(2*n-5)/2.

+0
1

3, 36, 300, 2520, 22680, 221760, 2358720, 27216000, 339292800, 4550515200, 65383718400, 1002550348800, 16345929600000, 282457663488000, 5157467707392000, 99236792438784000, 2007144156745728000 (list; graph; listen)

	OFFSET	`3,1`
	REFERENCES	`J. Riordan, Enumeration of trees by height and diameter, IBM J. Res. Dev. 4 (1960), 473-478.`
	LINKS	`Index entries for sequences related to factorial numbers`
	CROSSREFS	`Sequence in context: A056307 A056299 A073980 this_sequence A003691 A038146 A067444` `Adjacent sequences: A034857 A034858 A034859 this_sequence A034861 A034862 A034863`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

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