5536440

Appears in sequences

• Triangular array read by rows: T(n,k) is the number of functions f:{1,2,...,n}->{1,2,...,n} with a height of k; n>=1, 0<=k<=n-1.at n=30A216242
• Triangle of functions in a size n set for which the sequence of composition powers starts with a length k stem (index) before entering a cycle (period).at n=24A225540