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1, 1, 2, 3, 5, 8, 13, 21... is the Fibonacci Series

It could as well be a series of prime numbers :

1, 2, 3, 5, 7, 11, 13, 17, 19, etc.

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14y ago

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Q: What numbers are missing from 1 2 3 5 13 21?
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