| Matrix size (n) | RI |
| 1 | 0 |
| 2 | 0 |
| 3 | 0.52 |
| 4 | 0.89 |
| 5 | 1.11 |
| 6 | 1.25 |
| 7 | 1.35 |
| 8 | 1.40 |
| 9 | 1.45 |
| 10 | 1.49 |
| 11 | 1.51 |
| 12 | 1.52 |
| 13 | 1.56 |
| 14 | 1.57 |
| 15 | 1.58 |