





def 	__lowerCamelCase							(UpperCAmelCase__     :							Optional[int] = 4_0_0_0_0_0_0  ):
					SCREAMING_SNAKE_CASE    			=       []
					SCREAMING_SNAKE_CASE			,   SCREAMING_SNAKE_CASE    			=       0, 1
					while b <= n:
										if b % 2 == 0:
															even_fibs.append(UpperCAmelCase__  )
										SCREAMING_SNAKE_CASE			,   SCREAMING_SNAKE_CASE    			=       b, a + b
					return sum(UpperCAmelCase__  )


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





def 	__lowerCamelCase							(UpperCAmelCase__     :							int  ):
					assert isinstance(UpperCAmelCase__      , UpperCAmelCase__  ), F"The input value of [n={number}] is not an integer"

					if number == 1:
										return 2
					elif number < 1:
										SCREAMING_SNAKE_CASE    			=       F"The input value of [n={number}] has to be > 0"
										raise ValueError(UpperCAmelCase__  )
					else:
										SCREAMING_SNAKE_CASE    			=       sylvester(number - 1  )
										SCREAMING_SNAKE_CASE    			=       num - 1
										SCREAMING_SNAKE_CASE    			=       num
										return lower * upper + 1


if __name__ == "__main__":
							print(f"""The 8th number in Sylvester's sequence: {sylvester(8)}""")




