Number of (1+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards.

A233619

Number of (1+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards.

Terms

    a(0) =17064a(1) =395955a(2) =9120456a(3) =209902869a(4) =4828862487a(5) =111082137228

External references