Number of n X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, diagonally or antidiagonally.
A232916
Number of n X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, diagonally or antidiagonally.
Terms
- a(0) =3a(1) =18a(2) =246a(3) =5808a(4) =316800a(5) =33994188a(6) =8119777890
External references
- oeis: A232916