Number of nX4 0..4 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero.

A230395

Number of nX4 0..4 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 5, and upper left element zero.

Terms

    a(0) =0a(1) =0a(2) =82a(3) =3200a(4) =88580a(5) =2467778a(6) =68210356a(7) =1854786186a(8) =50178350064

External references