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| n | a(n) |
|---|---|
| 1 | 71 |
| 2 | 631 |
| 3 | 21961 |
| 4 | 27431 |
| 5 | 49121 |
| 6 | 68581 |
| 7 | 121661 |
| 8 | 156241 |
| 9 | 393031 |
| 10 | 428741 |
| 11 | 689201 |
| 12 | 851831 |
| 13 | 1406071 |
| 14 | 1488761 |
| 15 | 2621431 |
| 16 | 3007621 |
| 17 | 4052231 |
| 18 | 4930381 |
| 19 | 5513671 |
| 20 | 5717861 |
| 21 | 6360551 |
| 22 | 7049681 |
| 23 | 7535701 |
| 24 | 7786871 |
| 25 | 9999991 |
| 26 | 11248631 |
| 27 | 13309991 |
| 28 | 15208741 |
[71,631,21961,27431,49121,68581,121661,156241, 393031,428741,689201,851831,1406071,1488761, 2621431,3007621,4052231,4930381,5513671,5717861, 6360551,7049681,7535701,7786871,9999991,11248631, 13309991,15208741] |