steinhaus_cycle

steinhaus_cycle.py

def sum_of_squared_digits(n):
  digits = [i for i in str(n)]
  sum = 0
  for digit in digits:
      sum += int(digit)**2
  return sum


iter = 0
iters = []
for n in range(1, 127):
  while int(n) not in [1,4,16,37,58,89,145,42,20]:
    iter += 1
    n = sum_of_squared_digits(n)
  iters.append(iter)
  iter = 0


for i, n in enumerate(iters):
  print(f'Number {i+1} in {n} iterations')