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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 186 |
| 3 | 40476 |
| 4 | 10723968 |
| 5 | 3152470670 |
| 6 | 995141926013 |
| 7 | 330443561580215 |
| 8 | 113954535526102076 |
| 9 | 40466434693734970267 |
[1,186,40476,10723968,3152470670,995141926013, 330443561580215,113954535526102076, 40466434693734970267] |