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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 12 |
| 4 | 1503 |
| 5 | 114696 |
| 6 | 8913024 |
| 7 | 847131696 |
| 8 | 107419889151 |
| 9 | 19047514016106 |
| 10 | 4855914055193274 |
| 11 | 1811510852881383396 |
[0,0,12,1503,114696,8913024,847131696, 107419889151,19047514016106,4855914055193274, 1811510852881383396] |