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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 128 |
| 3 | 9792 |
| 4 | 886784 |
| 5 | 92722944 |
| 6 | 11014965248 |
| 7 | 1465369976832 |
| 8 | 215937597784064 |
| 9 | 34916329300783104 |
| 10 | 6147843514432913408 |
| 11 | 1170908043876450435072 |
[2,128,9792,886784,92722944,11014965248, 1465369976832,215937597784064,34916329300783104, 6147843514432913408,1170908043876450435072] |