Number of nX6 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal.
A207233
Number of nX6 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal.
Terms
- a(0) =425a(1) =180625a(2) =14540437a(3) =2320163321a(4) =350097798369
External references
- oeis: A207233