A000778 - OEIS

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A000778

Catalan(n)+Catalan(n+1)-1.

1, 2, 6, 18, 55, 173, 560, 1858, 6291, 21657, 75581, 266797, 950911, 3417339, 12369284, 45052514, 165002459, 607283489, 2244901889, 8331383609, 31030387439, 115948830659, 434542177289, 1632963760973 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	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.` `Equals A005807(n) - 1. Cf. A071716.` `Sequence in context: A148455 A094590 A004529 * A006725 A066158 A148456` `Adjacent sequences: A000775 A000776 A000777 * A000779 A000780 A000781`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.