108505112

Appears in sequences

• Total number of ordered k-tuples (k=0..n) of distinct elements from an n-element set: a(n) = Sum_{k=0..n} n!/k!.at n=11A000522
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n having along the lower contour exactly k reentrant corners, i.e., a vertical step that is followed by a horizontal step (n>=1, k>=0).at n=36A121579
• a(n) = e*Gamma(2*n,1).at n=5A294039
• Nearest integer to e*n!.at n=11A370973