Generating function
$$U_{798}(x, y) = \frac{1}{\left(- x \left(y + 1\right) + 1\right)^{2}}$$
Explicit formula
$$T_{798}(n, m, k) = {\binom{n}{m}} {\binom{2 k + n - 1}{n}}$$
| 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 2 | 0 | 0 | 0 | 0 | 0 |
| 3 | 6 | 3 | 0 | 0 | 0 | 0 |
| 4 | 12 | 12 | 4 | 0 | 0 | 0 |
| 5 | 2 | 3 | 2 | 5 | 0 | 0 |
| 6 | 3 | 6 | 6 | 3 | 6 | 0 |
| 7 | 42 | 105 | 14 | 105 | 42 | 7 |
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