Number of nX3 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.
A207223
Number of nX3 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) =23a(1) =529a(2) =6819a(3) =100997a(4) =1482361a(5) =21553541a(6) =312522517a(7) =4536114221a(8) =65902168601a(9) =957521298093
External references
- oeis: A207223