| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 115 |
| 3 | 739 |
| 4 | 1365 |
| 5 | 13997 |
| 6 | 35571 |
| 7 | 468409 |
| 8 | 1445055 |
| 9 | 21226859 |
| 10 | 73973931 |
| 11 | 1148109637 |
| 12 | 4289486945 |
| 13 | 68628631487 |
| 14 | 267714393779 |
| 15 | 4363979828661 |
| 16 | 17495451002837 |
| 17 | 288742958413869 |
| 18 | 1179160655695485 |
| 19 | 19640515026470277 |
| 20 | 81257674712215213 |
[81,115,739,1365,13997,35571,468409,1445055, 21226859,73973931,1148109637,4289486945, 68628631487,267714393779,4363979828661, 17495451002837,288742958413869,1179160655695485, 19640515026470277,81257674712215213] |