Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X 4 array with new integer colors introduced in row major order.

A216334

Number of horizontal and antidiagonal neighbor colorings of the even squares of an n X 4 array with new integer colors introduced in row major order.

Terms

    a(0) =1a(1) =5a(2) =42a(3) =726a(4) =15144a(5) =502658a(6) =18378580a(7) =950376664a(8) =52183667212

External references