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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 27 |
| 3 | 734 |
| 4 | 20448 |
| 5 | 549608 |
| 6 | 14309072 |
| 7 | 362942080 |
| 8 | 9010004672 |
| 9 | 219696673664 |
| 10 | 5276496285696 |
| 11 | 125098701453824 |
| 12 | 2933030497825792 |
| 13 | 68102636822126592 |
| 14 | 1567870419323465728 |
| 15 | 35824767230145847296 |
| 16 | 813097556314108592128 |
[0,27,734,20448,549608,14309072,362942080, 9010004672,219696673664,5276496285696, 125098701453824,2933030497825792, 68102636822126592,1567870419323465728, 35824767230145847296,813097556314108592128] |