$$U_{916}(x, y) = \frac{x}{3} + \frac{x^{2} + 2 x + 1}{9 \sqrt[3]{\frac{x^{3}}{27} + \frac{x^{2}}{9} + \frac{x \left(27 y + 3\right)}{27} + y + \frac{\sqrt{3} \sqrt{y \left(2 x^{2} + 4 x + 27 y + 2\right)} \left(x + 1\right)}{9} + \frac{1}{27}}} + \sqrt[3]{\frac{x^{3}}{27} + \frac{x^{2}}{9} + \frac{x \left(27 y + 3\right)}{27} + y + \frac{\sqrt{3} \sqrt{y \left(2 x^{2} + 4 x + 27 y + 2\right)} \left(x + 1\right)}{9} + \frac{1}{27}} + \frac{1}{3}$$

$$T_{916}(n, m, k) = \begin{cases}{\binom{k}{n}}&\text{if m=0 } ,\ \\\frac{2^{m} k {\binom{k - 2 m}{n}} {\binom{k - 2 m - 1}{m - 1}}}{m} \end{cases} $$