is expanded up to orders 10 and 100 for a hypothetical system comprising an atom with an atomic number of one. In this fictitious scenario, a single electron cloud, characterized by an amplitude equal to one and with decay coefficient λ = 3, its center is separated from the atom by a distance d. Figure illustrates the convergence of the series, demonstrating that as the order increases, the sum converges to a defined limit. While we do not provide exact, nor approximate, expressions for the limit when K -→ ∞ in this study, this topic still warrants to be mentioned given that obtaining such an expression not only would contribute to reduce the overall computational cost, but also to alleviate numerical noise, like it is observed in Figure . Floating-point precision errors are prevented in Figure by obtaining exact values using the open-source software Maxima, using its default arbitrary-precision arithmetic, and only casting the result of each sum to a floating-point precision representation after a factorization of the exact result.