id:A080243 - OEIS Search Results

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Signed super-Catalan or little Schroeder numbers.

+0
5

1, -1, 3, -11, 45, -197, 903, -4279, 20793, -103049, 518859, -2646723, 13648869, -71039373, 372693519, -1968801519, 10463578353, -55909013009, 300159426963, -1618362158587, 8759309660445 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Row sums of triangle A080245`
	REFERENCES	`I. P. Goulden and D. M. Jackson, Combinatorial Enumeration, Wiley, N.Y., 1983, Exercise 2.7.12.(b).`
	FORMULA	`G.f.: (-1+x+sqrt(1+6*x+x^2))/x/4. - Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 27 2003`
	CROSSREFS	`Cf. A001003, A080245.` `Sequence in context: A049160 A146086 A049177 this_sequence A001003 A151131 A151132` `Adjacent sequences: A080240 A080241 A080242 this_sequence A080244 A080245 A080246`
	KEYWORD	`sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 13 2003`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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