Number of nX6 0..2 arrays with exactly floor(nX6/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.

A222917

Number of nX6 0..2 arrays with exactly floor(nX6/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Terms

    a(0) =16a(1) =3972a(2) =356398a(3) =27663713a(4) =2133576918a(5) =165904381397

External references