Pyramid #74
Generating function
$$U_{74}(x, y) = \frac{y + 1}{\left(1 - x\right)^{2}}$$
Explicit formula
$$T_{74}(n, m, k) = {\binom{k}{m}} {\binom{2 k + n - 1}{n}}$$
Data table
1 1 0 0 0 0 0
2 2 0 0 0 0 0
3 3 0 0 0 0 0
4 4 0 0 0 0 0
5 5 0 0 0 0 0
6 6 0 0 0 0 0
7 7 0 0 0 0 0
Export
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