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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 29 |
| 4 | 400 |
| 5 | 10289 |
| 6 | 496548 |
| 7 | 45455677 |
| 8 | 7983420736 |
| 9 | 2716094133313 |
| 10 | 1803251169342820 |
| 11 | 2348787270663723581 |
| 12 | 6024912118926389490448 |
| 13 | 30516957491540079828757553 |
| 14 | 305811332460677494410532494660 |
| 15 | 6071677788061208810793717466942237 |
[1,1,4,29,400,10289,496548,45455677,7983420736, 2716094133313,1803251169342820, 2348787270663723581,6024912118926389490448, 30516957491540079828757553, 305811332460677494410532494660, 6071677788061208810793717466942237] |