| \( x \) | \( \exp{(-x)} \) | Series | Number of terms in series |
| 0.0 | 0.100000E+01 | 0.100000E+01 | 1 |
| 10.0 | 0.453999E-04 | 0.453999E-04 | 44 |
| 20.0 | 0.206115E-08 | 0.487460E-08 | 72 |
| 30.0 | 0.935762E-13 | -0.342134E-04 | 100 |
| 40.0 | 0.424835E-17 | -0.221033E+01 | 127 |
| 50.0 | 0.192875E-21 | -0.833851E+05 | 155 |
| 60.0 | 0.875651E-26 | -0.850381E+09 | 171 |
| 70.0 | 0.397545E-30 | NaN | 171 |
| 80.0 | 0.180485E-34 | NaN | 171 |
| 90.0 | 0.819401E-39 | NaN | 171 |
| 100.0 | 0.372008E-43 | NaN | 171 |