Inverse of Matrix with condition...

I need to do the inverse of a lower triangular matrix for which I need to choose elements (a_ij) = (i+j)^2 when i>j. choose the length n=8. I know the inverse of lower triangular matrix but don't know how to choose the elements so that the above conditions are satisfied. Help me please...

Answer 1

[Matt J]

   I=(1:8).';
   J=I.';

   A=tril( (I+J).^2 )

[Md Abu Helal]

@Matt Thank you