You are thinking of the value that is generated for that input, but that position may be used by the number generated by a later member of the sequence.

Bear in mind that 1) the array has to be in order and 2) there are no repeating positions.

I had the same issue for a bit. You didnt calculate far enough down the list. 57 should be there.

Language JS ?
Sorry there are no errors in the tests.

when u(x) = 9

y = 2x9+1 = 19

z = 3x9+1 = 28

but in test cases z = 27

same goes when u(x) = 19

'z' should be 58 instead test cases fails saying it should be equal to 57

it's for the coders

• Valid password will only be ALPHANUMERIC characters

Just make sure your password don't have space or semicolon or some other special characters.

If you're not sure what's not working for you, please post as a question instead. An issue is for when there's a clear problem with the kata. Also, please mention your language. Take note that almost 37K solvers have completed it in JavaScript. Here's some documentation on Troubleshooting-your-solution. If you wish, you may post your code with proper markdown and remember to use a spoiler tag. Then someone may be able to help you.

Unhandled rejection TestError: characters may not be adjacent - Expected: 2, instead got: 3

eveything passed but it's giving me error on this example which i don't even know what it is.
i tried to remove spaces with text=text.split(" ").join(""); but it's still giving me an error.
Any suggestions ?