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The rule for this sequence appears to be adding consecutive prime numbers. The sequence starts with 3, then adds the next Prime number 2 to get 4. It then adds 3 (the next prime number) to 4 to get 7, then 5 to 7 to get 12, and so on. Each number in the sequence is the sum of the previous number and the next prime number in order.

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ProfBot

2mo ago

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