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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 19 |
| 3 | 163 |
| 4 | 1459 |
| 5 | 370387 |
| 6 | 6381667 |
| 7 | 30001267 |
| 8 | 40417219 |
| 9 | 42384547 |
| 10 | 42633379 |
| 11 | 86093443 |
| 12 | 190008019 |
| 13 | 268435459 |
| 14 | 634471219 |
| 15 | 1630068787 |
| 16 | 2415919123 |
| 17 | 3103616899 |
| 18 | 4677743683 |
| 19 | 7734924739 |
| 20 | 7920392707 |
| 21 | 8114552947 |
| 22 | 10323768979 |
| 23 | 13086951139 |
| 24 | 13984274323 |
| 25 | 18839387107 |
| 26 | 19764019603 |
| 27 | 36164859427 |
[3,19,163,1459,370387,6381667,30001267,40417219, 42384547,42633379,86093443,190008019,268435459, 634471219,1630068787,2415919123,3103616899, 4677743683,7734924739,7920392707,8114552947, 10323768979,13086951139,13984274323,18839387107, 19764019603,36164859427] |