7. A sequence of numbers is arranged according to the following rule:
$$
\frac{1}{3}, \frac{3}{5}, \frac{5}{7}, \frac{7}{9}, \frac{9}{11} \text {, }
$$
$\qquad$
Starting from the $\qquad$ term, the difference between each term and the previous term is less than $\frac{1}{2021}$.
$45$