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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 92 |
| 4 | 1824 |
| 5 | 48804 |
| 6 | 1649724 |
| 7 | 67492872 |
| 8 | 3243567552 |
| 9 | 179139978072 |
| 10 | 11181615816216 |
| 11 | 778466939121552 |
| 12 | 59811143359463952 |
| 13 | 5027200928936108064 |
| 14 | 458865351655379262432 |
| 15 | 45201262487568977507328 |
| 16 | 4779609140451030860102400 |
| 17 | 539990133396500652971120640 |
[1,1,7,92,1824,48804,1649724,67492872,3243567552, 179139978072,11181615816216,778466939121552, 59811143359463952,5027200928936108064, 458865351655379262432,45201262487568977507328, 4779609140451030860102400, 539990133396500652971120640] |