Repeated convolution of a continous uniform distribution



Hi  all,

I want to do a repeated convolution of a continous uniform distribution in a limited interval [-a,a].

It is clear to me that after the first convolution there will be a triangular distribution and that it will become broader and smoother every time and asymptotically gaussian.

How can I calculate/plot the resulting distribution after x iterations with Maxima?

Best regards,
weaker