Number of nX4 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column.
A206696
Number of nX4 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column.
Terms
- a(0) =75a(1) =5625a(2) =363465a(3) =23335217a(4) =1488199144a(5) =94853765621
External references
- oeis: A206696