Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.
A232455
Number of nX4 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally, vertically, diagonally or antidiagonally.
Terms
- a(0) =15a(1) =3015a(2) =187989a(3) =12521603a(4) =865692227a(5) =59192688269
External references
- oeis: A232455