$$U_{363}(x, y) = \frac{y^{2}}{2} + y - \frac{\sqrt{4 x + y^{4} + 4 y^{3} + 6 y^{2} + 4 y + 1}}{2} + \frac{1}{2}$$

$$T_{363}(n, m, k) = \begin{cases}0&\text{if n<k} ,\ \\- \frac{k {\binom{2 k - 4 n}{m}} {\binom{k - n - 1}{n - 1}}}{n} \end{cases} $$