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A015057 q-Catalan numbers (binomial version) for q=-3. 0
1, 1, 10, 793, 583102, 3815415802, 225503698948660, 119805449249886397129, 573084012222813752884459126, 24668552204097304242240261360949726, 9557210465694593089306513607806406698372300 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
{1 / (n+1)_q} {2 n choose n}_q.
MATHEMATICA
Table[4 QBinomial[2n, n, -3]/(1 - (-3)^(n+1)), {n, 0, 20}] (* Vladimir Reshetnikov, Sep 16 2016 *)
CROSSREFS
Sequence in context: A222689 A242373 A221045 * A302133 A322918 A233170
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)