Number of nX4 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 diagonally or antidiagonally.

A229376

Number of nX4 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 diagonally or antidiagonally.

Terms

    a(0) =60a(1) =518a(2) =6730a(3) =78690a(4) =956866a(5) =11441370a(6) =138118032a(7) =1657198220a(8) =19969628086a(9) =239888727922

External references