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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 39 |
| 5 | 59 |
| 6 | 477 |
| 7 | 2175 |
| 8 | 41571 |
| 9 | 127539 |
| 10 | 340551 |
| 11 | 15732537 |
| 12 | 221272626669 |
| 13 | 2700614460969 |
| 14 | 66944775830061 |
| 15 | 616049024759241 |
| 16 | 6245844517335369 |
| 17 | 13085071811371140879 |
| 18 | 43795350588094552821 |
| 19 | 63464174140920940599 |
| 20 | 633160367499665048108061 |
[2,3,5,39,59,477,2175,41571,127539,340551, 15732537,221272626669,2700614460969, 66944775830061,616049024759241,6245844517335369, 13085071811371140879,43795350588094552821, 63464174140920940599,633160367499665048108061] |