61325

Appears in sequences

• Triangle read by rows: T(n,k) = number of functions from an n-element set into but not onto a k-element set.at n=25A101030
• a(n) is the number of 2 X 2 matrices with entries in {1, ..., n} that are not the product of two 2 X 2 positive integer matrices.at n=16A260550
• Euler transform of A055457.at n=39A373296