Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

A223112

Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Terms

    a(0) =6a(1) =124a(2) =5624a(3) =244607a(4) =10831996a(5) =488343248a(6) =22325434918

External references