8233803

Appears in sequences

• Number of labeled rooted trees of nonempty sets with n points. (Each node is a set of 1 or more points.)at n=7A048802
• Triangle read by rows: T(n,k) is the number of labeled quasi-loop-threshold graphs on vertex set [n] with k components, for n >= 1 and 1 <= k <= n.at n=28A350746