Number of 2 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.
A208409
Number of 2 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) =2a(1) =15a(2) =182a(3) =2698a(4) =41914a(5) =658450a(6) =10370330a(7) =163422914a(8) =2575668586a(9) =40595679634a(10) =639841707002
External references
- oeis: A208409