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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 228 |
| 4 | 24485 |
| 5 | 12253352 |
| 6 | 23379869304 |
| 7 | 184428463987187 |
| 8 | 5729938855632345013 |
[1,7,228,24485,12253352,23379869304, 184428463987187,5729938855632345013] |