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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 16 |
| 4 | 133 |
| 5 | 1521 |
| 6 | 22184 |
| 7 | 393681 |
| 8 | 8233803 |
| 9 | 198342718 |
| 10 | 5408091155 |
| 11 | 164658043397 |
| 12 | 5537255169582 |
| 13 | 203840528337291 |
| 14 | 8153112960102283 |
| 15 | 352079321494938344 |
| 16 | 16325961781591781401 |
| 17 | 809073412162081974237 |
| 18 | 42674870241038732398720 |
| 19 | 2386963662244981472850709 |
[1,3,16,133,1521,22184,393681,8233803,198342718, 5408091155,164658043397,5537255169582, 203840528337291,8153112960102283, 352079321494938344,16325961781591781401, 809073412162081974237,42674870241038732398720, 2386963662244981472850709] |