# Glossary

## Sequence

A sequence is a collection of objects, typically numbers, that may repeat. An example of a finite sequence is $(\pi, \sqrt{2}, 0)$; an example of an infinite sequence is the Fibonacci sequence $(1, 1, 2, 3, 5, 8, 13, \ldots)$. We use the notation $a_n$ to represent the $n$-th term of a sequence.