Number of 2-colorings of an n X n grid, up to rotational symmetry.
A047937
Number of 2-colorings of an n X n grid, up to rotational symmetry.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =140a(4) =16456a(5) =8390720a(6) =17179934976
External references
- oeis: A047937