Number of (n+2)X4 0..3 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

A187355

Number of (n+2)X4 0..3 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

Terms

    a(0) =7776a(1) =89150a(2) =2103856a(3) =39189180a(4) =823266330a(5) =16573583244a(6) =341631507734

External references