Number of n X 3 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

A203186

Number of n X 3 0..4 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

Terms

    a(0) =25a(1) =3209a(2) =263725a(3) =19617781a(4) =1508941377a(5) =117061422325

External references