159338640

Appears in sequences

• Number of functions f:{1,2,...,n}->{1,2,...,n} such that Im(f) contain two fixed elements.at n=7A126778
• Second differences of ninth powers (A001017).at n=8A255179
• Triangle read by rows: T(n,k) is the number of endofunctions on [n] where the difference between the smallest and largest values in the image of the function is k, 0 <= k < n.at n=44A391488