Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X n array with new integer colors introduced in row major order.

A216331

Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X n array with new integer colors introduced in row major order.

Terms

    a(0) =1a(1) =2a(2) =15a(3) =726a(4) =2387180a(5) =37060650272

External references