[tex]\bf \begin{array}{l|l} n &\stackrel{f(n)}{3n-5}\\ \cline{1-2} 1&3(1)-5\\ &-2\\\\ 2&3(2)-5\\ &1\\\\ 3&3(3)-5\\ &4\\\\ 4&3(4)-5\\ &7 \end{array}[/tex]
