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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 27 |
| 3 | 297 |
| 4 | 4581 |
| 5 | 87363 |
| 6 | 2014389 |
| 7 | 54516969 |
| 8 | 1695624345 |
| 9 | 59673787587 |
| 10 | 2345478318369 |
| 11 | 101896766246817 |
| 12 | 4850500185441909 |
| 13 | 251143864572078819 |
| 14 | 14055460408215741069 |
| 15 | 845667848072862801657 |
| 16 | 54441943452534058086321 |
| 17 | 3734566046400701428294275 |
[1,3,27,297,4581,87363,2014389,54516969, 1695624345,59673787587,2345478318369, 101896766246817,4850500185441909, 251143864572078819,14055460408215741069, 845667848072862801657,54441943452534058086321, 3734566046400701428294275] |