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

A215899

Number of diagonal 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) =1a(2) =15a(3) =602a(4) =2387217a(5) =33093356640

External references