Generating function
$$U_{495}(x, y) = \frac{x}{\left(1 - y\right)^{2}} + \frac{1}{1 - y}$$
Explicit formula
$$T_{495}(n, m, k) = {\binom{k}{n}} {\binom{k + m + n - 1}{m}}$$
| 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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