Number of n X 2 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.
A229406
Number of n X 2 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.
Terms
- a(0) =15a(1) =163a(2) =1756a(3) =18712a(4) =199595a(5) =2127718a(6) =22684613a(7) =241841143a(8) =2578301479a(9) =27487534672a(10) =293047669224
External references
- oeis: A229406