Tying a formula into a chart label

[datadummy]

I am trying to tie a formula capturing my "n" number into a label on a chart and doesn't seem to be working it is showing the formula written out instead of the formula working and providing the result, here is my formula ="n="&A$4. Is it possible to have a formula incorporated into an axis label?

 

[SpillerBD]

I believe you have to use VBA to make the Label change. Could use a ChangeEvent so it updates when you change "n"...