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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1850672 |
| 4 | 11690616534627 |
| 5 | 246211478304046636024 |
| 6 | 14919265746950486383601562197 |
| 7 | 2285085934263252199073238394141449534 |
| 8 | 798203800902002138190338074022806761037450631 |
| 9 | 586566986371155102435901052470650279895779757665905993 |
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