Number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.

A205356

Number of (n+1) X 4 0..2 arrays with every 2 X 2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.

Terms

    a(0) =194a(1) =1562a(2) =12866a(3) =107330a(4) =904514a(5) =7690946a(6) =65916482a(7) =568956866a(8) =4941735746a(9) =43157726402a(10) =378706958402

External references