Pyramid #1402
Pyramid #1403
Pyramid #1404
Generating function
$$U_{1403}(x, y) = y \left(x + 1\right)^{3} + 1$$
Explicit formula
$$T_{1403}(n, m, k) = {\binom{k}{m}} {\binom{3 m}{n}}$$
Data table
1 1 0 0 0 0 0
0 3 0 0 0 0 0
0 3 0 0 0 0 0
0 1 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 #153: Change x y
Export
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