hermite_normalization_N: Convenience function to output Hermite normalization factors
Description
The method returns numeric normalization factors that, when multiplied by
the physicist Hermite polynomials times a Gaussian factor i.e.
\(\exp{x^2/2}H_k(x)\), yields orthonormal Hermite functions \(h_k(x)\)
for \(k=0,\dots,N\).