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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 42 |
| 4 | 3382 |
| 5 | 1118946 |
| 6 | 1459438050 |
| 7 | 7332741364328 |
| 8 | 143431562727241070 |
| 9 | 10922269761078538034876 |
| 10 | 3236762187328159003256067178 |
| 11 | 3732763619664688373840578545273092 |
[0,2,42,3382,1118946,1459438050,7332741364328, 143431562727241070,10922269761078538034876, 3236762187328159003256067178, 3732763619664688373840578545273092] |