Number of n X n 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.
A207352
Number of n X n 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.
Terms
- a(0) =3a(1) =81a(2) =12468a(3) =12218660a(4) =76964941511
External references
- oeis: A207352