$$U_{144}(x, y) = \frac{1 - \sqrt{- 2 y \sqrt{4 x + 1} - 2 y + 1}}{2 y}$$

$$T_{144}(n, m, k) = \begin{cases}\frac{k {\binom{k + 2 m - 1}{m}}}{k + m}&\text{if n=0} ,\ \\\frac{\left(-1\right)^{n - 1} k {\binom{k + 2 m - 1}{m}} {\binom{- k - m + 2 n - 1}{n - 1}}}{n} \end{cases} $$