No probs :)

Right. I was working directly with base array. Now it's ok. Thanks for clarification.

Cannot reproduce the error with my code that always works; my best guess is that your solution somehow modifies the base array, thus giving raise to the problem above.

Edited the code accordingly, but unless otherwise asked, it is always better not to modify your input.

Confirm. Seems like something wrong with random test function for js. Test output:

It should work for random inputs too - Expected: 952, instead got: 146```

My sequence: `[ 9, 1, 5, 42, 146]`

Basic test passed with no errors.

Can you write the whole sequence step-by-step?

I got the following output when submitting:

Random tests
Testing for base [5, 15, 15] and n 7
It should work for random inputs too: -315 should equal -27795

I don't think the test is working properly. The given inputs should produce -315, which is what my code also produced. What am I doing wrong here?