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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 17 |
| 4 | 19 |
| 5 | 53 |
| 6 | 373 |
| 7 | 983 |
| 8 | 6709 |
| 9 | 6761 |
| 10 | 6763 |
| 11 | 17333 |
| 12 | 17707 |
| 13 | 43783 |
| 14 | 103681 |
| 15 | 317789 |
| 16 | 785671 |
| 17 | 2177321 |
| 18 | 5581493 |
| 19 | 38770357 |
| 20 | 39070457 |
| 21 | 1836305137 |
| 22 | 10749957121 |
| 23 | 12586147631 |
| 24 | 12586251313 |
| 25 | 32951279111 |
| 26 | 86252640919 |
| 27 | 86267571127 |
| 28 | 86267571263 |
| 29 | 213265164691 |
| 30 | 225845730829 |
[2,7,17,19,53,373,983,6709,6761,6763,17333,17707, 43783,103681,317789,785671,2177321,5581493, 38770357,39070457,1836305137,10749957121, 12586147631,12586251313,32951279111,86252640919, 86267571127,86267571263,213265164691,225845730829] |