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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 7 |
| 3 | 101 |
| 4 | 864 |
| 5 | 7365 |
| 6 | 63331 |
| 7 | 554839 |
| 8 | 4931118 |
| 9 | 44339730 |
| 10 | 402709395 |
| 11 | 3687732409 |
| 12 | 34007530868 |
[0,7,101,864,7365,63331,554839,4931118,44339730, 402709395,3687732409,34007530868] |