Generating function
$$U_{236}(x, y) = \frac{x + y}{\left(1 - x\right)^{2}}$$
Explicit formula
$$T_{236}(n, m, k) = {\binom{k}{m}} {\binom{k + m + n - 1}{- k + m + n}}$$
| 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1 | 2 | 0 | 0 | 0 | 0 | 0 |
| 2 | 3 | 0 | 0 | 0 | 0 | 0 |
| 3 | 4 | 0 | 0 | 0 | 0 | 0 |
| 4 | 5 | 0 | 0 | 0 | 0 | 0 |
| 5 | 6 | 0 | 0 | 0 | 0 | 0 |
| 6 | 7 | 0 | 0 | 0 | 0 | 0 |
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