365617

Appears in sequences

• Triangle read by rows: T(n,k) = 1 + n! - k! - (n - k)! + k!*(n - k)!.at n=49A155453
• Triangle read by rows: T(n,k) = 1 + n! - k! - (n - k)! + k!*(n - k)!.at n=50A155453
• The number of vertices on a 2 by 1 ellipse formed by the straight line segments mutually connecting all points formed by dividing the ellipse into 2n equal angle sectors from its origin.at n=27A341762