Pyramid #909
Pyramid #910
Pyramid #911
Generating function
$$U_{910}(x, y) = \left(x + 1\right) \left(2 y + 1\right)$$
Explicit formula
$$T_{910}(n, m, k) = 2^{m} {\binom{k}{m}} {\binom{k}{n}}$$
Data table
1 2 0 0 0 0 0
1 2 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 0 0 0 0 0
Related
Pyramid #911: Right on x
Pyramid #912: Right on y
Pyramid #914: Left on y
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