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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 73 |
| 5 | 433 |
| 6 | 607 |
| 7 | 13381 |
| 8 | 37279 |
| 9 | 4800307 |
| 10 | 1281054613 |
| 11 | 63338216281 |
[1,3,7,73,433,607,13381,37279,4800307,1281054613, 63338216281] |