Number of (n+1)X4 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.

A205763

Number of (n+1)X4 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) =8659a(1) =274013a(2) =9909258a(3) =375857889a(4) =14312320196a(5) =545700470559

External references