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| n | a(n) |
|---|---|
| 1 | 257 |
| 2 | 13121 |
| 3 | 3124999 |
| 4 | 3376853 |
| 5 | 174625993 |
| 6 | 533810141 |
| 7 | 16048035481 |
| 8 | 3620189879 |
| 9 | 982740799 |
| 10 | 547344139109 |
| 11 | 497929938133 |
| 12 | 1105109875657 |
| 13 | 15682480615619 |
| 14 | 1391016035411 |
| 15 | 83209719751 |
| 16 | 84224951222611 |
| 17 | 165554755409789 |
| 18 | 254747341131683 |
| 19 | 701000310909907 |
| 20 | 317304132615017 |
[257,13121,3124999,3376853,174625993,533810141, 16048035481,3620189879,982740799,547344139109, 497929938133,1105109875657,15682480615619, 1391016035411,83209719751,84224951222611, 165554755409789,254747341131683,701000310909907, 317304132615017] |