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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 14 |
| 4 | 769 |
| 5 | 101178 |
| 6 | 42306830 |
| 7 | 51145342760 |
| 8 | 181720148100909 |
| 9 | 1885049686514472003 |
[0,3,14,769,101178,42306830,51145342760, 181720148100909,1885049686514472003] |