Number of (n+1)X2 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.

A205761

Number of (n+1)X2 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) =192a(1) =1262a(2) =8659a(3) =62607a(4) =462040a(5) =3490700a(6) =26672819a(7) =205747848a(8) =1595214033a(9) =12413756669a(10) =96806542939a(11) =756001274858

External references