A015106 - OEIS

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A015106

q-Catalan numbers (recurrence version) for q=-9.

1, 1, -8, -665, 483544, 3173511682, -187386353065808, -99585165693268026701, 476312561203989614441440600, 20503694883570579788445502041773422, -7943551457092331370323478258038812629918704 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	FORMULA	`a(n) = sum_{i=1}^{n-1} q^{(i-1)} a(i) a(n-i).`
	CROSSREFS	`Sequence in context: A196588 A197045 A159621 * A099126 A172919 A101180` `Adjacent sequences: A015103 A015104 A015105 * A015107 A015108 A015109`
	KEYWORD	`sign`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified February 17 05:54 EST 2012. Contains 205985 sequences.