id:A000781 - OEIS Search Results

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3*Catalan(n)-Catalan(n-1)-1.

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1, 4, 12, 36, 111, 353, 1154, 3860, 13155, 45525, 159561, 565249, 2020687, 7280419, 26410094, 96378164, 353576699, 1303271309, 4824150869, 17925098069, 66834680639, 249981423899, 937696277309 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`J. R. Stembridge, Some combinatorial aspects of reduced words in finite Coxeter groups. Trans. Amer. Math. Soc. 349 (1997), no. 4, 1285-1332.`
	CROSSREFS	`Cf. A000108, A000782.` `Sequence in context: A156946 A003946 A052156 this_sequence A055395 A113990 A056383` `Adjacent sequences: A000778 A000779 A000780 this_sequence A000782 A000783 A000784`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

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