$$U_{460}(x, y) = \frac{\left(y + 1\right)^{4} + \sqrt{4 x \left(y + 1\right)^{2} + \left(y + 1\right)^{8}}}{2 \left(y + 1\right)^{2}}$$

$$T_{460}(n, m, k) = \begin{cases}1&\text{if n=0 and m=0} ,\ \\{\binom{2 k}{m}}&\text{if m>0 and n=0} ,\ \\\frac{k {\binom{2 k - 6 n}{m}} {\binom{k - n - 1}{n - 1}}}{n}&\text{if n>0} \end{cases} $$