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

A233620

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

Terms

    a(0) =430608a(1) =27826929a(2) =1777375908a(3) =113340508656

External references