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

A203373

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

Terms

    a(0) =108a(1) =748a(2) =5208a(3) =36300a(4) =253068a(5) =1764360a(6) =12301020a(7) =85762188a(8) =597930552a(9) =4168748268a(10) =29064349260a(11) =202635502632

External references