<image>(2013 Autumn • Yueyang County School Level Monthly Exam) As shown in Figures (1), (2), (3), and (4), each pattern is composed of small squares. Now, following the same pattern (the arrangement of the small squares is the same), a new pattern is constructed. Let the nth figure contain f(n) small squares.
(1) f(6) = ____; (2) f(n) = ____.