A015058 q-Catalan numbers (binomial version) for q=-4.

1, 1, 17, 4305, 17685969, 1158222948817, 1214707441621563857, 20378476519005090654009809, 5470368244500158631765129973873105, 23494985488623606981701685225398976313178577

Offset: 0

Author

Olivier Gérard

Keywords

• nonn
• easy

Formula

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