Number of n X n 0..4 arrays with every element equal to a diagonal or antidiagonal reflection, and new values 0 upwards introduced in row major order.
A209679
Number of n X n 0..4 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) =1243a(3) =2143147a(4) =6713848491
External references
- oeis: A209679