The function is and initial value of .

                        (Substitute )

                    ()

                           (Evaluate power: )

= 3                                 (Add: 1 + 2 = 3)

                           (Substitute )

                       ()

                           (Evaluate power: )

                              (Add: 9 + 2 = 11)

                         (Substitute )

                     ()

                        (Evaluate power: )

                             (Add: 121 + 2 = 123)

The first three iterates are 3, 11 and 123.