If you need some resources which would help you with authoring, there's some available:

• Tutorial,
• JavaScript authoring guide,
• Kata authoring guidelines, with sub-pages,
• Codewars Discord and #help-author, #reviewing, and #kata-ideas channels.

Hi, thanks so much for your helpful feedback, this is my first time trying to make a kata and this has helped a lot.

I have removed the input validation aspect, added sample tests, and have added a random test. I'd be grateful if you could see if you think this is resolved (and different enough to be published).

Please do not publish kata which are not ready to be published.

• Sample tests are missing.
• There is no random tests.
• Please avoid mixed output types and "side problems" like input validation. It does not make the task more interesting, and makes the kata difficult to translate.
• I think the task is similar to some other "arithmetic sequence" kata, but I'd have to find one.

EDIT:

• This one is very similar: https://www.codewars.com/kata/586f6741c66d18c22800010a, but not the same