John Parker

W. Yang, "Improved recursive algorithm for light scattering by a multilayered sphere", Applied Optics 42(9), (2003)

Don't bother with the conda install of MiePy, just use the pip method. There shouldn't be any problem in a fresh conda environment. You can always make a new one,...

C. H. Choi, J. Ivanic, M. S. Gordon, K. Ruedenberg, "Rapid and stable determination of rotation matrices between spherical harmonics by direct recursion" Journal of Chemical Physics 111, 8825-8831 (1999)...

In d9da4bfa301f752cb9e3610fb181b67a1e58eb9b, there is now `miepy.sources.vsh_source`, which can be used to construct a column of the T-matrix in combination with the cluster coefficients