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| n | a(n) |
|---|---|
| 12 | 1 |
| 13 | 22369621 |
| 14 | 400319959420837 |
| 15 | 6822861635108183247077 |
| 16 | 114917519925881846404167134693 |
| 17 | 1929880702992615813429218299211809253 |
| 18 | 32385932129579122653905315624401024370889189 |
[1,22369621,400319959420837, 6822861635108183247077, 114917519925881846404167134693, 1929880702992615813429218299211809253, 32385932129579122653905315624401024370889189] |