66. There is a sequence of positive integers, where the 1st number is 1, the 2nd number is the least common multiple (LCM) of 1 and 2, the 3rd number is the LCM of 1, 2, and 3, ..., the nth number is the LCM of 1, 2, ..., n. How many different values are there among the first 100 numbers in this sequence?
Answer: 36