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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 1049 |
| 3 | 29593 |
| 4 | 720305 |
| 5 | 18519049 |
| 6 | 468783431 |
| 7 | 11931365309 |
| 8 | 303182474797 |
[21,1049,29593,720305,18519049,468783431, 11931365309,303182474797] |