how do I...?

[Isaac Kriegman <zac ozacua org>]

I have a spread sheet with where I often change cells A1 and B1 in order 
to see how they effect cell C1.

I would like to generate a table which along the x-axis runs through a 
range of A1 values and the y-axis through B1 values.  The table data 
itself would be the C1 result.

So for instance if C1=A1+B1 how would I generate the following table data:


           1  |  2    3    4

(B1 values) 2  |  3    4    5    <--- resultant C1 values

           3  |  4    5    6
                ______________

                1    2    3
                (A1 values)


Note: though my example is quite simple, and I could easy create a 
fomula for it, my real spread sheet is much more complex, so creating a 
custom formula would be more difficult.

Is there a simple way to do this?

Thanks,
Zac