Number of non-isomorphic colorings of a toroidal n X n grid using exactly two swappable colors.

A376747

Number of non-isomorphic colorings of a toroidal n X n grid using exactly two swappable colors.

Terms

    a(0) =0a(1) =4a(2) =31a(3) =2107a(4) =671103a(5) =954459519

External references