56994domain: NAppears in sequencesRow sums of triangle A182701.at n=20A182705Number of ways to partition the multiset consisting of n copies each of 1, 2, and 3 into n sets of size 3.at n=22A254233a(n) is the total number of down steps between the 3rd and 4th up steps in all 2-Dyck paths of length 3*n.at n=8A334641