Number of nX3 0..6 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

A203061

Number of nX3 0..6 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

Terms

    a(0) =49a(1) =16625a(2) =3421817a(3) =608893191a(4) =111898706731

External references