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

A233803

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

Terms

    a(0) =7959956a(1) =1231134446a(2) =192011782168

External references