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

A197243

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

Terms

    a(0) =1a(1) =4a(2) =3a(3) =275a(4) =5062a(5) =405065a(6) =48703999a(7) =11304892092

External references