Number of (n+1)X3 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.

A205762

Number of (n+1)X3 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.

Terms

    a(0) =1262a(1) =17674a(2) =274013a(3) =4570761a(4) =77757894a(5) =1336717872a(6) =23044169753a(7) =397824057617

External references