id:A003008 - OEIS Search Results

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Number of n-level expressions.
(Formerly M1147)

+0
1

1, 1, 2, 4, 8, 17, 39, 90, 213 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`Guy, R. K. and Selfridge, J. L.; The nesting and roosting habits of the laddered parenthesis. Amer. Math. Monthly 80 (1973), 868-876.` `N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	LINKS	`Index entries for sequences related to parenthesizing`
	CROSSREFS	`Sequence in context: A036375 A036376 A000598 this_sequence A054199 A054197 A137856` `Adjacent sequences: A003005 A003006 A003007 this_sequence A003009 A003010 A003011`
	KEYWORD	`nonn,more`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.