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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 19 |
| 3 | 29 |
| 4 | 47 |
| 5 | 89 |
| 6 | 197 |
| 7 | 523 |
| 8 | 1667 |
| 9 | 6397 |
| 10 | 29437 |
| 11 | 160423 |
| 12 | 1023227 |
| 13 | 7552957 |
| 14 | 63845779 |
| 15 | 612095179 |
| 16 | 6597973097 |
| 17 | 79345496843 |
| 18 | 1057111639847 |
| 19 | 15505433597669 |
[15,19,29,47,89,197,523,1667,6397,29437,160423, 1023227,7552957,63845779,612095179,6597973097, 79345496843,1057111639847,15505433597669] |