A015061 q-Catalan numbers (binomial version) for q=-6.

1, 1, 37, 47773, 2230338061, 3745710394891885, 226492829959633927321645, 493024123850119464761454780231085, 38635442513535592967437553577069552272387245

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: A129053 A324256 A096349 * A015037 A262786 A140746

Adjacent sequences: A015058 A015059 A015060 * A015062 A015063 A015064

Keyword

nonn,easy

Author

Olivier Gérard

Status

approved