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

A196331

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

Terms

    a(0) =1a(1) =5a(2) =7a(3) =335a(4) =3793a(5) =237905a(6) =20775275a(7) =5845172493

External references