Function evals_eq_hypercubes 

pub fn evals_eq_hypercubes<'a, F: Field>(
    n: usize,
    x: impl IntoIterator<Item = &'a F>,
) -> Vec<F>

Given vector x in F^n, returns a concatenation of evals_eq_hypercube(x[..n]) for all valid n in order. Also, the order of masks is of different endianness.