Number of n X n 0..5 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.
A209680
Number of n X n 0..5 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.
Terms
- a(0) =1a(1) =15a(2) =1508a(3) =6716352a(4) =66825091608
External references
- oeis: A209680