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| n | a(n) |
|---|---|
| 2 | 12 |
| 3 | 18180 |
| 4 | 17678180 |
| 5 | 23906871625 |
| 6 | 33142751210880 |
| 7 | 40920467881841016 |
| 8 | 39881847574391332064 |
| 9 | 27839801028626330786100 |
| 10 | 12898777607987820532044600 |
| 11 | 3796362296831030040318923015 |
| 12 | 708799758875178944116824699876 |
[12,18180,17678180,23906871625,33142751210880, 40920467881841016,39881847574391332064, 27839801028626330786100, 12898777607987820532044600, 3796362296831030040318923015, 708799758875178944116824699876] |