OP solved it, closing

intresting

Yes, but 6 and 7 are incorrect, because the next correct number after 1 is 2, which doesn't appear. Therefore, all that comes after 1 is missplaced and should be included in the returned list. I changed the description to "Incorrect page numbers may appear next to each other".

The recursion stops when the parameter becomes 0. It is falsy so will return 0, then rollback :)

Duplicate issue of no sample tests below

From the description:
"The sequence will always be 10 numbers long and we know that the base is going to be between 2 and 10 inclusive"
"When sorted, the sequence is made up of consecutive numbers."
Ten consecutive numbers always contain all available digits in bases < 10

Language?

yeah, just use 3.8. It effectively times out in 3.6.

I'll try to update the kata this evening (the tests are "old fashion", for now)

edit: done

I just tried the current version of the tests and everything is ok, even with an empty code on the user side... => ?

(tried with 3.8)

We don't always get what we want. @Blind4Basics could you take a look at it?

There is an open (in fact there are 2) issue about that, there is no need to open another. Closing.