id:A015100 - OEIS Search Results

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q-Catalan numbers (recurrence version) for q=-5.

+0
1

1, 1, -4, -109, 13436, 8425506, -26312994024, -411193252871529, 32123650782112689116, 12548365338592689141400286, -24508500955561451477156078353144 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n) = sum_{i=1}^{n-1} q^{(i-1)} a(i) a(n-i).`
	CROSSREFS	`Sequence in context: A076265 A114876 A037980 this_sequence A061454 A135917 A063406` `Adjacent sequences: A015097 A015098 A015099 this_sequence A015101 A015102 A015103`
	KEYWORD	`sign`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified December 4 12:27 EST 2008. Contains 151280 sequences.

AT&T Labs Research