Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.

A223146

Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Terms

    a(0) =10a(1) =187a(2) =4065a(3) =84196a(4) =1753639a(5) =36926759a(6) =788312639a(7) =17055726949a(8) =373400072400

External references