What is the sum of all the elements of the term, which has elements in it, of the following sequence:
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Look at the series; the no's increases by two hence 5th series will have no's (21, 23, 25, 27, 29) and for 6th series they 'll be (31, 33, 35, 37, 39, 41) add these no's u 'll get 216 that final answer