Pyramid #279
Generating function
$$U_{279}(x, y) = \frac{y^{2} + 1}{1 - x}$$
Explicit formula
$$T_{279}(n, m, k) = \frac{\left(\left(-1\right)^{m} + 1\right) {\binom{k}{\frac{m}{2}}} {\binom{k + n - 1}{n}}}{2}$$
Data table
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
Export
expand_less