Number of n X n 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column.
A206693
Number of n X n 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column.
Terms
- a(0) =3a(1) =81a(2) =15712a(3) =23335217a(4) =262482902920
External references
- oeis: A206693