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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 216 |
| 4 | 6624 |
| 5 | 207000 |
| 6 | 9190800 |
| 7 | 825640200 |
| 8 | 16041009600 |
| 9 | 174445979400 |
| 10 | 2519775258000 |
| 11 | 8315258351400 |
| 12 | 716624083375200 |
| 13 | 33382738550561400 |
| 14 | 1114469886995665200 |
| 15 | 5970374394619635000 |
| 16 | 340709365452960504000 |
| 17 | 6878070315081640174500 |
[1,9,216,6624,207000,9190800,825640200, 16041009600,174445979400,2519775258000, 8315258351400,716624083375200,33382738550561400, 1114469886995665200,5970374394619635000, 340709365452960504000,6878070315081640174500] |