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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 256 |
| 5 | 38880 |
| 6 | 1289945088 |
| 7 | 42855402240000000 |
| 8 | 605828739547255327948800000000 |
| 9 | 13263549731442762279026688000000000000000000000000000 |
| 10 | 1334793240853871268746431553848403294648071618560000000000000000000000000000000000000000000 |
[0,2,3,256,38880,1289945088,42855402240000000, 605828739547255327948800000000, 13263549731442762279026688000000000000000000000000\ 000, 13347932408538712687464315538484032946480716185600\ 00000000000000000000000000000000000000000] |