$$U_{160}(x, y) = \frac{x^{2} - 2 x + \left(x - 1\right) \sqrt{x^{2} - 2 x - 4 y + 1} + 1}{2 y}$$

$$T_{160}(n, m, k) = \frac{k {\binom{k + 2 m - 1}{m}} {\binom{2 m + n - 1}{n}}}{k + m}$$