regarding the choice of sobol_a

Hi, thank you for the excellent implementation.

I brought this up because I noticed that while the sobol_minit values align with those in Joe & Kuo (2008), the sobol_a values appear to differ. Could you provide some insight into why the sobol_a values are defined the way they are?

Thanks again!

Start by locating the implementation and definitions of sobol_a and sobol_minit, then compare their values with Joe & Kuo (2008). Confirm whether the difference is intentional and document the rationale in the issue or project documentation.

Written by the indexing model from the issue text.