Continue a function (arithmetic sequence) down a column

Hi, I want a column which starts with the first value on A1 e.g. 3. The following data down the column should be:

A1*1
A1*2
A1*3
A1*4
.... and so on. 

When I select three terms and drag the black box, bottom right, down. It continues:

A3*1
A3*2
A3*3
A6*1
A6*2
.... etc. 

Please help.

@oweng: Thanks for clarifying what @heartpick wanted to do. Now I understand his intention and question.

@heartpick - your cell content is not really clear to me but maybe the screenshot helps you.

image description

In cell A1 enter the initial base (e.g., 3). In cell A2 enter the formula =A1+A$1. Click on cell A2 and drag down. This will continue to add the value in cell A1 (using an absolute reference to row 1 i.e., $1) to the value in the prior cell (i.e., A3 for cell A4, etc.)