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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 315 |
| 4 | 17129 |
| 5 | 1510425 |
| 6 | 196385475 |
| 7 | 35327367075 |
| 8 | 8399994587985 |
| 9 | 2550903574364145 |
| 10 | 963207568455370875 |
| 11 | 442613044315692124875 |
| 12 | 243195136160954426677305 |
| 13 | 157442856285298191126143625 |
| 14 | 118607799383105394973766029875 |
| 15 | 102867257381973743111023517821875 |
[1,1,11,315,17129,1510425,196385475,35327367075, 8399994587985,2550903574364145,963207568455370875, 442613044315692124875,243195136160954426677305, 157442856285298191126143625, 118607799383105394973766029875, 102867257381973743111023517821875] |