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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 13 |
| 3 | 421 |
| 4 | 25369 |
| 5 | 2449801 |
| 6 | 346065061 |
| 7 | 67243537453 |
| 8 | 17192488230961 |
| 9 | 5593309059948049 |
| 10 | 2255588021494237501 |
| 11 | 1103994926592923677621 |
| 12 | 644587811150505183179593 |
| 13 | 442516027690815793746696601 |
[1,1,13,421,25369,2449801,346065061,67243537453, 17192488230961,5593309059948049, 2255588021494237501,1103994926592923677621, 644587811150505183179593, 442516027690815793746696601] |