User:Bjshnog/sandbox

$$\sum_{n=1}^{{s}\wedge{t}}{\binom{t}{n}\left|\left\{ [k_i]_{i=1}^{s} : \sum_{i=1}^{s}{k_i}=n \text{ and } k \in (\mathbb{Z}\cap[0,c]) \right\}\right|}$$