Number of 5Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.

A231250

Number of 5Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.

Terms

    a(0) =0a(1) =68a(2) =3820a(3) =76136a(4) =1872136a(5) =52280836a(6) =1450042214a(7) =39779238784

External references