Number of (n+1)X4 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero.

A206313

Number of (n+1)X4 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero.

Terms

    a(0) =6831a(1) =258452a(2) =9841886a(3) =375274347a(4) =14309749540a(5) =545678293613

External references