Generating function
$$U_{988}(x, y) = \frac{1}{\left(y + 1\right)^{2} \left(- x \left(y + 1\right) + 1\right)}$$
Explicit formula
$$T_{988}(n, m, k) = {\binom{- 2 k + n}{m}} {\binom{k + n - 1}{n}}$$
| 1 | -2 | 3 | -4 | 5 | -6 | 7 |
| 1 | -1 | 1 | -1 | 1 | -1 | 1 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1 | 2 | 1 | 0 | 0 | 0 | 0 |
| 1 | 3 | 3 | 1 | 0 | 0 | 0 |
| 1 | 4 | 6 | 4 | 1 | 0 | 0 |
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