Integer series

Write a function that receives a number \(N\) as a parameter and generates a string with the numbers: \(1, 1, 2, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 4, 5, ... , 1, 2, 3, ... , N\)

Examples of test cases that you can automate with pytest are:

testcase number	input (\(N\))	expected output
1	4	“1, 1, 2, 1, 2, 3, 1, 2, 3, 4”
2	1	“1”
3	0	””
4	-3	“-1, -1, -2, -1, -2, -3”

Insist that the students test their programs by giving them a table
of test cases.