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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 5 |
| 4 | 43 |
| 5 | 449 |
| 6 | 4987 |
| 7 | 72901 |
| 8 | 1212427 |
| 9 | 24787981 |
| 10 | 646969237 |
| 11 | 18232771699 |
| 12 | 618394844407 |
| 13 | 23403866424979 |
| 14 | 934482952261687 |
| 15 | 40992652172565871 |
| 16 | 2036822404824377491 |
| 17 | 113103550009071331379 |
| 18 | 6516021186633720609839 |
| 19 | 413595871109487739782749 |
| 20 | 27897041506334948048370371 |
[2,2,5,43,449,4987,72901,1212427,24787981, 646969237,18232771699,618394844407,23403866424979, 934482952261687,40992652172565871, 2036822404824377491,113103550009071331379, 6516021186633720609839,413595871109487739782749, 27897041506334948048370371] |