input: from typing import List
  
  def get_nth_fibonacci(n: int) -> List[int]:
      """ Calculates and returns the first n numbers of the Fibonacci sequence.
      >>> get_nth_fibonacci(9)
      [0, 1, 1, 2, 3, 5, 8, 13, 21]
      >>> get_nth_fibonacci(1)
      [0]
      >>> get_nth_fibonacci(0)
      []
      """
      if n <= 0:
          return []
      fibonacci_sequence = [0]
      if n == 1:
          return fibonacci_sequence
      fibonacci_sequence.append(1)
      for i in range(2, n):
          fibonacci_sequence.append(fibonacci_sequence[-1] + fibonacci_sequence[-2])
      return fibonacci_sequence
output:     if n <= 0:
          return []
      fibonacci_sequence = [0]
      if n == 1:
          return fibonacci_sequence
      fibonacci_sequence.append(1)
      for i in range(2, n):
          fibonacci_sequence.append(fibonacci_sequence[-1] + fibonacci_sequence[-2])
      return fibonacci_sequence