Number of (n+1)X4 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums.

A186869

Number of (n+1)X4 0..2 arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums.

Terms

    a(0) =361a(1) =24414a(2) =431016a(3) =12048996a(4) =270129432a(5) =6869877312a(6) =162868019530

External references