The answer is 39. The rule is: 2 + (2^N) + N and N begins from 0.
For example for last Triangle N is equal to 5, then the answer is: 2 + (2^5) + 5 = 39
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The answer is 39. The rule is: 2 + (2^N) + N and N begins from 0.
For example for last Triangle N is equal to 5, then the answer is: 2 + (2^5) + 5 = 39