Number of 4 X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.
A208411
Number of 4 X n 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.
Terms
- a(0) =15a(1) =2795a(2) =667478a(3) =163422914a(4) =40039156736
External references
- oeis: A208411