34878248649domain: NAppears in sequencesNumber A(n,k) of Dyck paths having exactly k peaks in each of the levels 1,...,n and no other peaks; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=42A288972Number of Dyck paths having exactly two peaks in each of the levels 1,...,n and no other peaks.at n=6A289054