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

A234056

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

Terms

    a(0) =402000a(1) =23857470a(2) =1425517650a(3) =85374621482

External references