What is the sum of the arithmetic sequence 3, 9, 15…, if there are 22 terms?

Here is the sequence..
3,9,15,21,27,33,39,45,51,
57,63,69,75,81,87,93,99,105,111,117,123,129
Total sum equals 1452!

22 nd term = 129
Sum = 11(3+129) = 1452

Answer Prime

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