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

A233613

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

Terms

    a(0) =9120456a(1) =1777375908a(2) =345855899520

External references