Can a form generate its own form number in sequence?

Can a form generate its own form number in sequence?

I'm not sure I understood your requirements correctly.

To clarify, do you want to create a number sequence per submission?

We do have a unique ID widget that you can use to add custom unique numbers.

https://www.jotform.com/help/79-How-to-Add-Custom-Unique-IDs-to-your-Form-Submissions

Kindly check it out and let us know if this fits your requirements.