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| n | a(n) |
|---|---|
| 2 | 0 |
| 3 | 3 |
| 4 | 976 |
| 5 | 44275 |
| 6 | 1046556 |
| 7 | 18098871 |
| 8 | 262962368 |
| 9 | 3438697635 |
| 10 | 42050013500 |
[0,3,976,44275,1046556,18098871,262962368, 3438697635,42050013500] |