Need formula to produce a cascading irregular incrementer based on another column

I'm sorry, I meant to say...

EX)
My data column contains numbers as follows in
row 1 = 3,
row 2 = 8,
row 3 = 10 etc.

My calculation table needs to increment numbers from 1 to whateever the end is. I I want to get these results...
Calc Column:
rows 1-3 = 1
rows 4-11 = 2
rows 12-21 = 3
etc. based on the data column above.

In my sample worksheet attached is a better example.