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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 33 |
| 3 | 667 |
| 4 | 19953 |
| 5 | 796276 |
| 6 | 39884617 |
| 7 | 2409056091 |
| 8 | 170578159425 |
| 9 | 13865428827595 |
| 10 | 1273098711647601 |
| 11 | 130359650056935828 |
| 12 | 14731760791405826353 |
| 13 | 1821596921118627413112 |
| 14 | 244673069988065590056025 |
| 15 | 35478934710659760285365851 |
| 16 | 5524449097025217753681737985 |
| 17 | 919439893040295438072449964745 |
[1,3,33,667,19953,796276,39884617,2409056091, 170578159425,13865428827595,1273098711647601, 130359650056935828,14731760791405826353, 1821596921118627413112,244673069988065590056025, 35478934710659760285365851, 5524449097025217753681737985, 919439893040295438072449964745] |