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A015100 q-Catalan numbers (recurrence version) for q=-5. 0
1, 1, -4, -109, 13436, 8425506, -26312994024, -411193252871529, 32123650782112689116, 12548365338592689141400286, -24508500955561451477156078353144 (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: A076265 A114876 A037980 * A061454 A201450 A181272

Adjacent sequences:  A015097 A015098 A015099 * A015101 A015102 A015103

KEYWORD

sign

AUTHOR

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

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.