Number of (n+1) X 4 0..3 arrays with every 2 X 2 subblock having equal diagonal elements or equal antidiagonal elements.

A203791

Number of (n+1) X 4 0..3 arrays with every 2 X 2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =5488a(1) =142192a(2) =3784288a(3) =101071600a(4) =2700695728a(5) =72168659104

External references