Question: how to convert the vertical output to horizontal,and how to cite the result.

how to convert the vertical output to horizontal,and how to cite the result.

 for n to 20 do evalf(f(n)) end do;

                                     2.
                                     0.
                                     -4.
                                     -8.
                                     -8.
                                     0.
                                     16.
                                     32.
                                     32.
                                     0.
                                    -64.
                                    -128.
                                    -128.
                                     0.
                                    256.
                                    512.
                                    512.
                                     0.
                                   -1024.
                                   -2048.                                                                 (5)(the number can be used?)