Number of (n+1)X4 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero.

A205993

Number of (n+1)X4 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero.

Terms

    a(0) =330a(1) =2712a(2) =22612a(3) =189430a(4) =1588523a(5) =13324720a(6) =111764603a(7) =937463556a(8) =7863232776a(9) =65955006340a(10) =553215476117

External references