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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 16 |
| 4 | 3072 |
| 5 | 2949120 |
| 6 | 118908518400 |
| 7 | 30684105356083200 |
| 8 | 509012486930992988160000 |
| 9 | 1448974328493266972309245132800000 |
| 10 | 24498250851046882007528282887645298688000000 |
| 11 | 120709538882209643641596013856771385957962848665600000000 |
[1,2,16,3072,2949120,118908518400, 30684105356083200,509012486930992988160000, 1448974328493266972309245132800000, 24498250851046882007528282887645298688000000, 12070953888220964364159601385677138595796284866560\ 0000000] |