How to automatically increase keyframe values (1, 2, 3, 4, etc...)

Thank you for replying.

I will have a composiiton in AE that will count the number of times an action happens. The counter will increase incrementally at different times in the composition, which I will have to place manually in the Timeline. I'm OK with that.

But what I want to do is set up the composition with the counter and all the keyframes ready with their individual values. The first keyframe will have a value of 0. The one after that, 1. The final key frame will have a value of 300.

I know I can duplicate keyframes by copying and pasting. That's easy enough. But each keyframe has to have its own value. I could go into each one and manually enter those values, but I am curious to know if there is a formulaic way of doing it, so the values are created automatically when I set all this up.

Think of Excel. I have a starting cell with a value of 0 and then a formula in the next cell that references the first with the statement [prior cell + 1]. And the cell after that has the same. I can stretch that out three hundred times to get cells with incremental values from 0 to 300.

If you have any thoughts on the expression solution, please let me know. In the mean time, I'll Google away.

Many thanks.