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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 69 |
| 3 | 3507 |
| 4 | 122468 |
| 5 | 4590696 |
| 6 | 170937904 |
| 7 | 6330398606 |
| 8 | 235362503738 |
| 9 | 8754859878268 |
| 10 | 325475861455984 |
| 11 | 12099539397621289 |
| 12 | 449821095241853452 |
| 13 | 16722911203146960563 |
| 14 | 621702975576594657954 |
| 15 | 23112884157721171287549 |
[1,69,3507,122468,4590696,170937904,6330398606, 235362503738,8754859878268,325475861455984, 12099539397621289,449821095241853452, 16722911203146960563,621702975576594657954, 23112884157721171287549] |