| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 7 |
| 3 | 13 |
| 4 | 27 |
| 5 | 53 |
| 6 | 107 |
| 7 | 213 |
| 8 | 427 |
| 9 | 853 |
| 10 | 1707 |
| 11 | 3413 |
| 12 | 6827 |
| 13 | 13653 |
| 14 | 27307 |
| 15 | 54613 |
| 16 | 109227 |
| 17 | 218453 |
| 18 | 436907 |
| 19 | 873813 |
| 20 | 1747627 |
| 21 | 3495253 |
| 22 | 6990507 |
| 23 | 13981013 |
| 24 | 27962027 |
| 25 | 55924053 |
| 26 | 111848107 |
| 27 | 223696213 |
| 28 | 447392427 |
| 29 | 894784853 |
| 30 | 1789569707 |
[2,3,7,13,27,53,107,213,427,853,1707,3413,6827, 13653,27307,54613,109227,218453,436907,873813, 1747627,3495253,6990507,13981013,27962027, 55924053,111848107,223696213,447392427,894784853, 1789569707] |