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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 31 |
| 3 | 181 |
| 4 | 541 |
| 5 | 661 |
| 6 | 1087 |
| 7 | 1861 |
| 8 | 2179 |
| 9 | 2719 |
| 10 | 3727 |
| 11 | 7459 |
| 12 | 8089 |
| 13 | 8707 |
| 14 | 9109 |
| 15 | 10639 |
| 16 | 17341 |
| 17 | 19333 |
| 18 | 22501 |
| 19 | 23293 |
| 20 | 29287 |
| 21 | 32797 |
| 22 | 39847 |
| 23 | 40387 |
| 24 | 42703 |
| 25 | 46591 |
| 26 | 51613 |
| 27 | 53101 |
| 28 | 56149 |
| 29 | 56809 |
| 30 | 57829 |
| 31 | 59233 |
| 32 | 80779 |
| 33 | 87643 |
| 34 | 89113 |
| 35 | 89413 |
| 36 | 91291 |
| 37 | 93979 |
| 38 | 94261 |
| 39 | 98899 |
[13,31,181,541,661,1087,1861,2179,2719,3727,7459, 8089,8707,9109,10639,17341,19333,22501,23293, 29287,32797,39847,40387,42703,46591,51613,53101, 56149,56809,57829,59233,80779,87643,89113,89413, 91291,93979,94261,98899] |