If \(\left\{ a_{i} \right\}_{i = 1}^{n}\), where \(n\) is an even integer, is an arithmetic progression with common difference 1 , and \(\sum_{i = 1}^{n}\mspace{2mu} a_{i} = 192,\sum_{i = 1}^{n/2}\mspace{2mu} a_{2i} = 120\), and then \(n\) is equal to