Number of 4-colorings of an n X n grid, up to rotational symmetry.
A047939
Number of 4-colorings of an n X n grid, up to rotational symmetry.
Terms
- a(0) =1a(1) =4a(2) =70a(3) =65824a(4) =1073758336
External references
- oeis: A047939
A047939
Number of 4-colorings of an n X n grid, up to rotational symmetry.