$$U_{110}(x, y) = \frac{- x + y - \sqrt{x^{2} + x \left(- 2 y - 2\right) + y^{2} - 2 y + 1} + 1}{2 y}$$

$$T_{110}(n, m, k) = \begin{cases}1&\text{if n=0 and m=0} ,\ \\\frac{k {\binom{k + m + n}{n}} {\binom{m + n - 1}{n - 1}}}{k + m + n} \end{cases} $$