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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 13 |
| 3 | 97 |
| 4 | 1153 |
| 5 | 18433 |
| 6 | 184321 |
| 7 | 737281 |
| 8 | 22118401 |
| 9 | 575078401 |
| 10 | 12651724801 |
| 11 | 303641395201 |
| 12 | 4250979532801 |
| 13 | 212548976640001 |
| 14 | 8927057018880001 |
| 15 | 160687026339840001 |
| 16 | 10283969685749760001 |
| 17 | 473062605544488960001 |
[3,13,97,1153,18433,184321,737281,22118401, 575078401,12651724801,303641395201,4250979532801, 212548976640001,8927057018880001, 160687026339840001,10283969685749760001, 473062605544488960001] |