Number of (n+1) X 4 0..3 arrays with every 2 X 2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock sums.

A188369

Number of (n+1) X 4 0..3 arrays with every 2 X 2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock sums.

Terms

    a(0) =1936a(1) =315520a(2) =11342816a(3) =716732884a(4) =34292827560

External references