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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 54 |
| 4 | 3804 |
| 5 | 1022320 |
| 6 | 1065957628 |
| 7 | 4389587378792 |
| 8 | 72020744942708040 |
| 9 | 4721708591209396542528 |
| 10 | 1237892622263984613044109216 |
| 11 | 1298060581376190776821670648395840 |
[1,3,54,3804,1022320,1065957628,4389587378792, 72020744942708040,4721708591209396542528, 1237892622263984613044109216, 1298060581376190776821670648395840] |