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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 231 |
| 4 | 965838 |
| 5 | 22989265901 |
| 6 | 2461655754351495 |
| 7 | 985771420457603052511 |
| 8 | 1279614273812450904341423760 |
| 9 | 4801060151437579142777056341136944 |
| 10 | 47374533605081761722921471083862749119153 |
[0,1,231,965838,22989265901,2461655754351495, 985771420457603052511, 1279614273812450904341423760, 4801060151437579142777056341136944, 47374533605081761722921471083862749119153] |