A015078 q-Catalan numbers (binomial version) for q=-10.

1, 1, 101, 1009101, 1009191919101, 100918283737382819101, 1009183745648382838465473819101, 1009183654821945740211120375492184563819101

Offset

0,3

Links

Table of n, a(n) for n=0..7.

Formula

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

Crossrefs

Sequence in context: A138721 A068659 A252491 * A031982 A015041 A317957

Adjacent sequences: A015075 A015076 A015077 * A015079 A015080 A015081

Keyword

nonn,easy

Author

Olivier Gérard

Status

approved