Number of (n+1)X5 0..2 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.

A206124

Number of (n+1)X5 0..2 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) =1906a(1) =18572a(2) =201498a(3) =2501248a(4) =31537842a(5) =404927788a(6) =5199505646a(7) =66968651436a(8) =861836697714

External references