The number of ways of tiling the n X n grid up to the symmetries of the square by a tile that is fixed under 90-degree rotations, but not reflections.
A367523
The number of ways of tiling the n X n grid up to the symmetries of the square by a tile that is fixed under 90-degree rotations, but not reflections.
Terms
- a(0) =1a(1) =4a(2) =70a(3) =8292a(4) =4195360a(5) =8590033024
External references
- oeis: A367523