Answer
Does not make sense.
Work Step by Step
An arithmetic sequence is defined as a sequence which has a common difference $d$ and calculated as: $a_n=a_1+(n-1)d$
Sum of the an arithmetic sequence can be calculated by using formula $S_n=\dfrac{n}{2}(2a_1+(n-1)d)$
Here $S_n$ denotes sum and $a_1$ denotes first term or initial term with $d$ as common difference.
But the given sequence doe not follow a pattern of same $d$ , this means that the sequence is not a arithmetic sequence. Therefore, we cannot apply the sum formula.
