627382domain: NAppears in sequencesq-Catalan numbers (binomial version) for q=3.at n=4A015033G.f.: Sum_{k>=1} x^k/(1-x^k) * Product_{k>=1} (1+x^k)/(1-x^k).at n=29A305102Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) is the n-th q-Catalan number for q=k.at n=32A384437