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| n | a(n) |
|---|---|
| 1 | 57 |
| 2 | 3969 |
| 3 | 253877 |
| 4 | 16247233 |
| 5 | 1039681033 |
| 6 | 66531801953 |
| 7 | 4257533926265 |
| 8 | 272450106560337 |
| 9 | 17434754733893533 |
| 10 | 1115692985511411585 |
| 11 | 71395947744679117981 |
| 12 | 4568802905958678422033 |
| 13 | 292368974050746244520769 |
[57,3969,253877,16247233,1039681033,66531801953, 4257533926265,272450106560337,17434754733893533, 1115692985511411585,71395947744679117981, 4568802905958678422033,292368974050746244520769] |