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**1. The problem statement, all variables and given/known data**

2 4 3 9 5 25 18 324

**2. Relevant equations**

**3. The attempt at a solution**

2 squared is 4, 3 squared is 9, 5 squared is 25, 18 squared is 324. BUT... what is the next number in the pattern? we squared 2, then 3, then 5, then 18, then.....? At first I thought it was prime numbers, but then instead of 7, we jumped to 18?????

Help please? I'm going crazy