A015085 - OEIS

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A015085

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

1, 1, 5, 89, 5885, 1518897, 1558435125, 6386478643785, 104648850228298925, 6858476391221411106209, 1797922152786660462507074405, 1885261615172756172119161342909753 (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: A134497 A028353 A191512 * A067258 A167424 A174591` `Adjacent sequences: A015082 A015083 A015084 * A015086 A015087 A015088`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified February 16 21:51 EST 2012. Contains 205978 sequences.