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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 13 |
| 3 | 31 |
| 4 | 79 |
| 5 | 97 |
| 6 | 227 |
| 7 | 881 |
| 8 | 1013 |
| 9 | 2797 |
| 10 | 3181 |
| 11 | 3631 |
| 12 | 8101 |
| 13 | 22727 |
| 14 | 81001 |
| 15 | 101363 |
| 16 | 109013 |
| 17 | 131363 |
| 18 | 181813 |
| 19 | 272227 |
| 20 | 310181 |
| 21 | 310901 |
| 22 | 318181 |
| 23 | 318881 |
| 24 | 631013 |
| 25 | 636313 |
| 26 | 810401 |
| 27 | 818101 |
| 28 | 901097 |
| 29 | 904097 |
| 30 | 972227 |
| 31 | 1018813 |
| 32 | 1090013 |
| 33 | 1810013 |
| 34 | 2272727 |
[2,13,31,79,97,227,881,1013,2797,3181,3631,8101, 22727,81001,101363,109013,131363,181813,272227, 310181,310901,318181,318881,631013,636313,810401, 818101,901097,904097,972227,1018813,1090013, 1810013,2272727] |