Pyramid #1326
Pyramid #1327
Pyramid #1328
Generating function
$$U_{1327}(x, y) = x + y^{2} + y$$
Explicit formula
$$T_{1327}(n, m, k) = {\binom{k}{n}} {\binom{k - n}{- k + m + n}}$$
Data table
0 1 1 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 0
Related
Pyramid #9: Change x y
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