The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3108 |
| 3 | 154632 |
| 4 | 28978992 |
| 5 | 4265306528 |
| 6 | 635678359988 |
| 7 | 95355343910570 |
| 8 | 14264086558627070 |
| 9 | 2135123511088831648 |
| 10 | 319568536170962822998 |
| 11 | 47830472197175088248834 |
| 12 | 7158916142523278823866052 |
[0,3108,154632,28978992,4265306528,635678359988, 95355343910570,14264086558627070, 2135123511088831648,319568536170962822998, 47830472197175088248834,7158916142523278823866052] |