2020278931domain: NAppears in sequencesNumber of labeled rooted trimmed trees with n nodes.at n=10A052318Triangular array read by rows. T(n,k) is the number of rooted labeled trees on n nodes with exactly k vertices whose unique descendent is a leaf, n >= 1, 0 <= k <= floor((n-1)/2) + delta_{2,n}.at n=31A284417