For the even value of \displaystyle \boldsymbol{n}, the middle term is the \displaystyle \boldsymbol{\frac{n}{2} + 1} th term. If \displaystyle \boldsymbol{n} is odd, the middle terms are the \displaystyle \boldsymbol{\frac{n+1}{2}} th term and \displaystyle \boldsymbol{\left[\left(\frac{n+1}{2}\right) + 1\right]} th terms.