A015062 q-Catalan numbers (binomial version) for q=-7.

1, 1, 50, 119757, 14094337902, 81246911474597002, 22950408766815313800875300, 317662868501471575977731478166067621, 215446318838899436153587239312460946873230930006

Offset

0,3

Links

Table of n, a(n) for n=0..8.

Formula

{1 / (n+1)_q} {2 n choose n}_q.

Crossrefs

Sequence in context: A146518 A229670 A152514 * A015038 A152515 A111402

Adjacent sequences: A015059 A015060 A015061 * A015063 A015064 A015065

Keyword

nonn,easy

Author

Olivier Gérard

Status

approved