Pyramid #1396
Pyramid #1397
Pyramid #1398
Generating function
$$U_{1397}(x, y) = y \left(x + 1\right) + 1$$
Explicit formula
$$T_{1397}(n, m, k) = {\binom{k}{m}} {\binom{m}{n}}$$
Data table
1 1 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
0 0 0 0 0 0 0
0 0 0 0 0 0 0
Related
Pyramid #37: Change x y
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