Generating function
$$U_{465}(x, y) = \sqrt[3]{\frac{x \left(1 - y\right)}{2} + \frac{\sqrt{3} \sqrt{x \left(27 x + \frac{4}{\left(1 - y\right)^{4}}\right)} \left(1 - y\right)}{18} + \frac{1}{27 \left(1 - y\right)^{3}}} + \frac{1}{3 - 3 y} + \frac{1}{9 \left(1 - y\right)^{2} \sqrt[3]{\frac{x \left(1 - y\right)}{2} + \frac{\sqrt{3} \sqrt{x \left(27 x + \frac{4}{\left(1 - y\right)^{4}}\right)} \left(1 - y\right)}{18} + \frac{1}{27 \left(1 - y\right)^{3}}}}$$
Explicit formula
$$T_{465}(n, m, k) = \begin{cases}1&\text{if n=0 and m=0} ,\ \\\frac{\left(-1\right)^{m - 1} k {\binom{- k + n - 1}{m - 1}}}{m}&\text{if m>0 and n=0} ,\ \\\frac{k {\binom{k - 2 n - 1}{n - 1}} {\binom{k + m - 4 n - 1}{m}}}{n} \end{cases} $$
1 | 1 | 1 | 1 | 1 | 1 | 1 |
1 | -3 | 3 | -1 | 0 | 0 | 0 |
-2 | 14 | -42 | 7 | -7 | 42 | -14 |
7 | -77 | 385 | -1155 | 231 | -3234 | 3234 |
-3 | 45 | -315 | 1365 | -4095 | 9009 | -15015 |
143 | -2717 | 24453 | -138567 | 554268 | -1662804 | 3879876 |
-728 | 16744 | -184184 | 1289288 | -644644 | 24496472 | -73489416 |
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