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| n | a(n) |
|---|---|
| 2 | 9 |
| 3 | 63 |
| 4 | 16 |
| 5 | 162 |
| 6 | 1904 |
| 7 | 1056 |
| 8 | 15984 |
| 9 | 28000 |
| 10 | 75520 |
| 11 | 593280 |
| 12 | 575424 |
| 13 | 10209280 |
| 14 | 58028032 |
| 15 | 82616320 |
| 16 | 755404800 |
| 17 | 2255519744 |
| 18 | 6636896256 |
| 19 | 98721275904 |
| 20 | 108417761280 |
| 21 | 1303972577280 |
| 22 | 2009909428224 |
| 23 | 2344618524672 |
| 24 | 50095111274496 |
| 25 | 114342775226368 |
| 26 | 456293923946496 |
| 27 | 2380822275424256 |
[9,63,16,162,1904,1056,15984,28000,75520,593280, 575424,10209280,58028032,82616320,755404800, 2255519744,6636896256,98721275904,108417761280, 1303972577280,2009909428224,2344618524672, 50095111274496,114342775226368,456293923946496, 2380822275424256] |