Number of nX4 0..3 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.

A230784

Number of nX4 0..3 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.

Terms

    a(0) =0a(1) =820a(2) =117372a(3) =14875702a(4) =1986882996a(5) =265749521034

External references