id:A081321 - OEIS Search Results

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(2/3)*(2*n+1)*(2*n-1)!*binomial(3*n,2*n).

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6, 300, 47040, 14968800, 7991343360, 6422134118400, 7240779786240000, 10899907851216384000, 21115899915689779200000, 51167604130438090014720000, 151615591667542267763097600000, 539306547534817468755148800000000, 2267795648217238975260881584128000000 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`M. Bousquet and C. Lamathe, Enumeration of solid trees according to edge number and edge degree distribution, Discr. Math., 298 (2005), 115-141.`
	CROSSREFS	`Adjacent sequences: A081318 A081319 A081320 this_sequence A081322 A081323 A081324` `Sequence in context: A042119 A066718 A065947 this_sequence A104003 A015103 A123181`
	KEYWORD	`nonn`
	AUTHOR	`njas, May 22 2003`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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