Generating function
$$U_{987}(x, y) = \frac{1}{\left(y + 1\right) \left(- x \left(y + 1\right) + 1\right)}$$
Explicit formula
$$T_{987}(n, m, k) = {\binom{- k + n}{m}} {\binom{k + n - 1}{n}}$$
| 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 |
| 1 | 5 | 1 | 1 | 5 | 1 | 0 |
Related
Export
Export as LaTeX
Export as Maxima
Confirm deletion
Are you sure, you want to delete Pyramid #987?