A model estimates that at the end of each year from 2020 to 2025, the number of rabbits in a population was $200\%$ more than the number of rabbits in the population at the end of the previous year. The model estimates that at the end of 2021, there were 360 rabbits in the population. Which of the following equations represents this model, where $n$ is the estimated number of rabbits in the population $t$ years after the end of 2020 and $t\le 5$?