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A015089 q-Catalan numbers (recurrence version) for q=6. 1
1, 1, 7, 265, 57799, 75025897, 583552122727, 27227375795690569, 7621977131953256556295, 12802009986716861649949951657, 129014790439200398432389878440405671 (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: A003385 A129423 A048291 * A179565 A069449 A140031

Adjacent sequences:  A015086 A015087 A015088 * A015090 A015091 A015092

KEYWORD

nonn

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com)

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Last modified February 15 19:09 EST 2012. Contains 205852 sequences.