| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 4 |
| 4 | 196 |
| 5 | 17630 |
| 6 | 3673129 |
| 7 | 1986193307 |
| 8 | 3003748718884 |
| 9 | 13426920301736657 |
| 10 | 185166591284225200707 |
| 11 | 8146406517582852344067961 |
| 12 | 1173623326436235078315237985776 |
[0,0,4,196,17630,3673129,1986193307,3003748718884, 13426920301736657,185166591284225200707, 8146406517582852344067961, 1173623326436235078315237985776] |