id:A015099 - OEIS Search Results

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q-Catalan numbers (recurrence version) for q=-4.

+0
1

1, 1, -3, -55, 3429, 885137, -904638963, -3707218743911, 60731665539301365, 3980231929565571675617, -1043385959026442521712292579, -1094071562179856506263860787078039 (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: A119192 A103134 A134496 this_sequence A002818 A119190 A110058` `Adjacent sequences: A015096 A015097 A015098 this_sequence A015100 A015101 A015102`
	KEYWORD	`sign`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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

AT&T Labs Research