Number of (1+2) X (n+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors.

A238027

Number of (1+2) X (n+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors.

Terms

    a(0) =20a(1) =74a(2) =212a(3) =828a(4) =2312a(5) =9178a(6) =25652a(7) =102356a(8) =287960a(9) =1150916a(10) =3260168a(11) =13037240a(12) =37151120a(13) =148591610a(14) =425537780a(15) =1702102500a(16) =4894629560a(17) =19578333484a(18) =56494758872a(19) =225978330056a(20) =653985816944

External references