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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 49 |
| 4 | 1689 |
| 5 | 187392 |
| 6 | 46738368 |
| 7 | 20446754006 |
| 8 | 14021056991357 |
| 9 | 14141140657400321 |
| 10 | 20047531681346319557 |
| 11 | 38567298550226625579671 |
| 12 | 97861817259606311572409609 |
| 13 | 319914449561753621623849929222 |
| 14 | 1320949150506412557504787822889933 |
| 15 | 6773751604973857152218372443743552754 |
[1,4,49,1689,187392,46738368,20446754006, 14021056991357,14141140657400321, 20047531681346319557,38567298550226625579671, 97861817259606311572409609, 319914449561753621623849929222, 1320949150506412557504787822889933, 6773751604973857152218372443743552754] |