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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 28 |
| 3 | 17576 |
| 4 | 209295260 |
| 5 | 43308802158650 |
| 6 | 150315393336149895056 |
| 7 | 8610524734277600186228691452 |
| 8 | 8068213695203463278728832778415607708 |
| 9 | 122985780058082302876789680971972469134558550878 |
| 10 | 30386103720799858392019761983012781659021124133753353112778 |
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