Number of (n+1)X3 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums.

A186868

Number of (n+1)X3 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums.

Terms

    a(0) =171a(1) =2121a(2) =24414a(3) =285724a(4) =3409112a(5) =40893800a(6) =492154924a(7) =5938127608a(8) =71755699992a(9) =868144018572

External references