



'''simple docstring'''
def A__    (     UpperCAmelCase_ = 1_0_0_0							):
						return sum(2 * a * ((a - 1) // 2) for a in range(3  ,  n + 1							)							)


if __name__ == "__main__":
					print(solution())








"""simple docstring"""


from math import factorial

A_						=				{str(d): factorial(d) for d in range(10)}


def 					UpperCAmelCase__       (snake_case__							:					int    ):
  """simple docstring"""

  return sum(DIGIT_FACTORIAL[d] for d in str(snake_case__    )    )


def 					UpperCAmelCase__       ():
  """simple docstring"""

  _snake_case							:		List[str]								=  7 * factorial(9    ) + 1
  return sum(i for i in range(3		,   snake_case__    ) if sum_of_digit_factorial(snake_case__    ) == i    )


if __name__ == "__main__":
     print(F'''{solution() = }''')


