How to generate a number sequence in file using vi or Vim?

Question

Is there a way to generate a number sequence in vi or Vim?

For example, for an arbitrary range of lines i  through j (where i < j

Answer 1

The Nexus plugin provides the Series type and an object, s1, of that type used like this:

:4,8s/^/\=s1.next().' '/

Nexus also comes with an s0 Series object that yields 0 as its first .next() result. Both s0 and s1 use a 1-step increment. All Series objects have a .reset() method which sets them back to their initiated value. New Series objects can be created like the following call:

let s2 = Series(0, 2)

which creates a 2-step object meeting your second request (yielding: 2, 4, 6, 8, etc.).