code: def _generate_random_node_values(height):
      
      max_node_count = 2 ** (height + 1) - 1
      node_values = list(range(max_node_count))
      random.shuffle(node_values)
      return node_values
docs: Return random node values for building binary trees.
  
      :param height: Height of the binary tree.
      :type height: int
      :return: Randomly generated node values.
      :rtype: [int]