Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.
A206789
Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal.
Terms
- a(0) =4a(1) =256a(2) =180446a(3) =1382766472
External references
- oeis: A206789