Number of n X n 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.
A206951
Number of n X n 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.
Terms
- a(0) =3a(1) =81a(2) =11804a(3) =9803278a(4) =50967712088
External references
- oeis: A206951