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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 31 |
| 3 | 127 |
| 4 | 367 |
| 5 | 631 |
| 6 | 967 |
| 7 | 1231 |
| 8 | 3727 |
| 9 | 4231 |
| 10 | 6247 |
| 11 | 7927 |
| 12 | 8287 |
| 13 | 11887 |
| 14 | 17167 |
| 15 | 21031 |
| 16 | 22807 |
| 17 | 30631 |
| 18 | 34231 |
| 19 | 39607 |
| 20 | 48847 |
| 21 | 72367 |
| 22 | 108247 |
| 23 | 109567 |
| 24 | 126031 |
| 25 | 160807 |
| 26 | 185767 |
| 27 | 198031 |
| 28 | 231367 |
| 29 | 235231 |
| 30 | 261127 |
| 31 | 265231 |
| 32 | 279847 |
| 33 | 290527 |
| 34 | 323767 |
| 35 | 354031 |
[7,31,127,367,631,967,1231,3727,4231,6247,7927, 8287,11887,17167,21031,22807,30631,34231,39607, 48847,72367,108247,109567,126031,160807,185767, 198031,231367,235231,261127,265231,279847,290527, 323767,354031] |