Brain Teasers
0, 1, 1, 3, 1, 6, 1, 7, 4, 8, ?, ?, ?
0, 1, 1, 3, 1, 6, 1, 7, 4, 8, ?, ?, ?
Hint
Which terms are 1?Answer
1, 16, 1.The nth term is the sum of the proper divisors of n. The prime numbers have 1 as their only proper divisor.
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