Pyramid #151
Generating function
$$U_{151}(x, y) = \frac{1 - \sqrt{- 4 x y^{2} - 8 x y - 4 x + 1}}{2 x \left(y + 1\right)^{2}}$$
Explicit formula
$$T_{151}(n, m, k) = \frac{k {\binom{2 n}{m}} {\binom{k + 2 n - 1}{n}}}{k + n}$$
Data table
1 0 0 0 0 0 0
1 2 1 0 0 0 0
2 8 12 8 2 0 0
5 3 75 1 75 3 5
14 112 392 784 98 784 392
42 42 189 504 882 10584 882
132 1584 8712 2904 6534 104544 121968
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