286992935964
domain: N
Appears in sequences
- Number of n-node labeled acyclic digraphs with 2 out-points.at n=6A003026
- Triangle read by rows: T(n,k) = number of labeled acyclic digraphs with n nodes, containing exactly n+1-k points of in-degree zero (n >= 1, 1<=k<=n).at n=34A058876
- Triangular array read by rows. T(n,k) is the number of labeled directed acyclic graphs on [n] with exactly k nodes of indegree 0.at n=38A361718