| n | basic approximation | with A correction |
| 3 | 0.63% | −4.9 × 10−5 |
| 10 | 1.9 × 10−3 | 1.5 × 10−7 |
| 30 | 6.4 × 10−4 | 1.7 × 10−7 |
| 100 | 4.9 × 10−5 | 2.0 × 10−8 |
| 300 | 6.4 × 10−5 | 2.4 × 10−9 |