Pyramid #117
Pyramid #118
Pyramid #119
Generating function
$$U_{118}(x, y) = x + \sqrt{4 y + 1}$$
Explicit formula
$$T_{118}(n, m, k) = 4^{m} {\binom{k}{n}} {\binom{\frac{k}{2} - \frac{n}{2}}{m}}$$
Data table
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 0
Related
Pyramid #117: Change x y
Export
expand_less