Pyramid #1105
Pyramid #1106
Pyramid #1107
Generating function
$$U_{1106}(x, y) = \left(x \left(y + 1\right) + 1\right)^{2}$$
Explicit formula
$$T_{1106}(n, m, k) = {\binom{2 k}{n}} {\binom{n}{m}}$$
Data table
1 0 0 0 0 0 0
2 2 0 0 0 0 0
1 2 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
Related
Pyramid #991: Right on x
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