| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 95 |
| 5 | 9220 |
| 6 | 3055073 |
| 7 | 3000338892 |
| 8 | 8812917082915 |
| 9 | 76878364475257062 |
| 10 | 1995945343880703817038 |
| 11 | 154116672749530867319434810 |
[0,1,4,95,9220,3055073,3000338892,8812917082915, 76878364475257062,1995945343880703817038, 154116672749530867319434810] |