code: def van_der_corput(n_sample, base=2, start_index=0):
      """Van der Corput sequence.
  
      Pseudo-random number generator based on a b-adic expansion.
  
      Parameters
      ----------
      n_sample : int
          Number of element of the sequence.
      base : int
          Base of the sequence.
      start_index : int
          Index to start the sequence from.
  
      Returns
      -------
      sequence : list (n_samples,)
          Sequence of Van der Corput.
      """
      sequence = []
      for i in range(start_index, start_index + n_sample):
          n_th_number, denom = 0.0, 1.0
          quotient = i
          while quotient > 0:
              quotient, remainder = divmod(quotient, base)
              denom *= base
              n_th_number += remainder / denom
          sequence.append(n_th_number)
  
      return sequence
  
imports: import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: van_der_corput(n_sample, base, start_index) and returns: sequence