Number of (n+1)X4 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

A185574

Number of (n+1)X4 0..3 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

Terms

    a(0) =44944a(1) =4649320a(2) =480362772a(3) =50465542904

External references