Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).

A229930

Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).

Terms

    a(0) =9a(1) =739a(2) =33119a(3) =1622763a(4) =78416265a(5) =3788842363a(6) =183213209145

External references