Number of n X n 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
A207983
Number of n X n 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
Terms
- a(0) =3a(1) =81a(2) =12468a(3) =12271227a(4) =81269646503
External references
- oeis: A207983