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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 2187 |
| 4 | 2351104 |
| 5 | 6153518125 |
| 6 | 31779658925496 |
| 7 | 287364845865893467 |
| 8 | 4200677982722915635200 |
| 9 | 93566442152660422280250537 |
| 10 | 3030525904161802498705606745000 |
| 11 | 137355046868929476532154243693393581 |
| 12 | 8436685562091750543736612601781557411328 |
| 13 | 683522945769518614776208838188411394718328617 |
[1,8,2187,2351104,6153518125,31779658925496, 287364845865893467,4200677982722915635200, 93566442152660422280250537, 3030525904161802498705606745000, 137355046868929476532154243693393581, 8436685562091750543736612601781557411328, 683522945769518614776208838188411394718328617] |