18245201

Appears in sequences

• q-Catalan numbers (binomial version) for q=4.at n=4A015034
• a(n) is the n-th q-Catalan number for q=n.at n=4A384282
• Square 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=40A384437