I don't have time to quickly type out anything correct, but look into the INDIRECT function. You can make cell references out of cell contents, literal strings, whatever.
Best to you,
Goober Dave
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Offset as shown above works. You might be able to do similar thing as offset using the index function or the row function or maybe the address function.
Indirect would require you to populate additional cells with addresses (that will be accessed by indirect formula in another cell). Could accomplish the same thing but wouldn't be my personal choice.
Offset and Index do similar things. Offset is a bit more flexible, but I tend to use Index, because that's what I grew up with.
Also I normally generate a column of index (or offset) numbers using a simple formula (=Cell above + 1), rather than using the Row function, just to keep things simple.