I frequently find myself in a situation where I want to express a comma separated list of $N$ elements, for example $Z_i$ where $i \in \{1,2,...,N\}$, which people often write as $Z_1, Z_2, ..., Z_N$.
However, I am not a fan of that notation because it takes more characters than would seem necessary; i.e., all that matters is that there is a set of $N$ $Z_i$ values. Is there a formal notation which I am missing?