input: Write a python function to find the sum of fourth power of first n odd natural numbers.
  assert odd_Num_Sum(2) == 82
  assert odd_Num_Sum(3) == 707
  assert odd_Num_Sum(4) == 3108
  
output: def odd_Num_Sum(n):
      return sum((2*i + 1)**4 for i in range(n))