1/5 the number of nX8 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

A185824

1/5 the number of nX8 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Terms

    a(0) =181a(1) =3701360a(2) =26231137608

External references