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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 61 |
| 6 | 421 |
| 7 | 29 |
| 8 | 2521 |
| 9 | 19 |
| 10 | 89 |
| 11 | 71 |
| 12 | 1693 |
| 13 | 232792561 |
| 14 | 6659 |
| 15 | 26771144401 |
| 16 | 331 |
| 17 | 101 |
| 18 | 72201776446801 |
| 19 | 1801 |
| 20 | 173 |
| 21 | 54941 |
| 22 | 89 |
| 23 | 442720643463713815201 |
| 24 | 593 |
| 25 | 5171 |
| 26 | 239 |
| 27 | 1222615931 |
| 28 | 103 |
| 29 | 7265496855919 |
| 30 | 6562349363 |
| 31 | 4447 |
| 32 | 147099357127 |
| 33 | 1931 |
[2,3,7,13,61,421,29,2521,19,89,71,1693,232792561, 6659,26771144401,331,101,72201776446801,1801,173, 54941,89,442720643463713815201,593,5171,239, 1222615931,103,7265496855919,6562349363,4447, 147099357127,1931] |