R is made for large collections of numbers and can sometimes get confusing to read. Luckily, R helps us out when providing output.

What might be the correct order for this sequence of numbers?

Great! R prints out the index of the first number in each line:13 is the 9th number in our collection and 21 is the 17th. We'll see [1] a lot in our results.

Maybe the numbers in the brackets should be in ascending order?