[R] how to apply summation sign formula to R

[Sebastian Hersberger]

Hi all

I have a short question relating to the usage of the summation sign in R.

Let's define A and B as two kxk matrice.
My goal is to calculate the matrix C for the periods from 1 to 200 (n=1-200).

C^(n) = Σ_(j=1)^n [(Σ_(i=1)^(j-1) A^i ) B (Σ_(i=1)^(j-1) A^i)’  ]

How has that to be implemented in R (lets say for example for period = n = 150)?

Thank you for your help!!

Kind regards,
Sebastian