Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4.

A197448

Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4.

Terms

    a(0) =11a(1) =321a(2) =15410a(3) =585194a(4) =23829080a(5) =982926107a(6) =40087361395

External references