Applications :: How Do I Fill A Column With Numbers And Equations Automatically In Numbers

I've been ripping my hair out trying to find the answer to this.

In Numbers for Mac, I need to fill a column automatically with a series of integers (1 - 50) and then the next column with a function that interacts with the first column.

For example:

Column A - 1 - 5

Column B - (value in Column A * 5)

I can't figure out how to do it in Numbers When I try to fill column a with 1 - 50 all it does is fill all 1's and I cant find an option how to make that change so it automatically numbers when I highlight them.

The best I can describe is how in Excel you can type 1 in the first cell, then highlight a bunch of cells and the little box appears that lets you click "Fill Series"