Number of nX4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.
A207531
Number of nX4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.
Terms
- a(0) =214a(1) =45796a(2) =6758694a(3) =1066263778a(4) =166743944836
External references
- oeis: A207531