Definition:Initial Segment of Natural Numbers/One-Based

Definition
Let $n \in \N$ be a natural number. The initial segment of the non-zero natural numbers determined by $n$:
 * $\left\{ {1, 2, 3, \ldots, n}\right\}$

is denoted $\N^*_{\le n}$.

Also denoted as
The usual notation for this is $\N^*_n$, but the notation $\N^*_{\le n}$ is less ambiguous.

Also see

 * Definition:Initial Segment of Zero-Based Natural Numbers