Number of (n+1) X (n+1) 0..3 arrays with every 2 X 2 subblock nonsingular.

A183701

Number of (n+1) X (n+1) 0..3 arrays with every 2 X 2 subblock nonsingular.

Terms

    a(0) =192a(1) =108624a(2) =710460576

External references