Number of nX7 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.
A207227
Number of nX7 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.
Terms
- a(0) =1121a(1) =1256641a(2) =312522517a(3) =125372637881
External references
- oeis: A207227