114751470domain: 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=39A288972Number of Dyck paths having exactly n peaks in each of the levels 1,2,3 and no other peaks.at n=5A289030