Number of (n+1)X4 0..3 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..3 introduced in row major order.
A206378
Number of (n+1)X4 0..3 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..3 introduced in row major order.
Terms
- a(0) =641a(1) =25945a(2) =1198601a(3) =57656713a(4) =2808967145a(5) =137393517193
External references
- oeis: A206378