Number of nX4 0..n+4-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

A265454

Number of nX4 0..n+4-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Terms

    a(0) =66a(1) =3358a(2) =216466a(3) =13943772a(4) =871209026a(5) =52509347006

External references