I am getting list index out of range error for jacobsthal sequence. I have added around 35 numbers in the sequence. i am still getting that error while all other test cases are passed. Can someone pls help?

my bad! but can you please help how do i check if required parameters are passed or not?

Traceback (most recent call last):
File "main.py", line 26, in
Test.assert_equals(prefill(0), p(0), "failed with number 0")
TypeError: prefill() missing 1 required positional argument: 'v'

Its giving me this error. Can the admin fix main.py file please?