Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.
A206961
Number of n X n 0..3 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.
Terms
- a(0) =4a(1) =256a(2) =188699a(3) =1657999936
External references
- oeis: A206961