61247664

Appears in sequences

• The number of (simultaneously) fixed and isolated points in the digraph representation of all functions f:{1,2,...,n}->{1,2,...,n}.at n=9A200248
• Triangular array read by rows: T(n,k) is the number of endofunctions f:{1,2,...,n}-> {1,2,...,n} whose largest component has exactly k nodes; n>=1, 1<=k<=n.at n=43A209324
• Triangle read by rows: T(n,k) is the number of endofunctions on [n] whose second-smallest component has size exactly k; n >= 0, 0 <= k <= max(0,n-1).at n=45A350079