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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 728 |
| 3 | 602468 |
| 4 | 3795674252 |
| 5 | 176569302110496 |
| 6 | 60960050569112225624 |
| 7 | 156025607439258576501944264 |
| 8 | 2960693161885750577087228146201160 |
| 9 | 416501345588614541672537137056124519706624 |
[6,728,602468,3795674252,176569302110496, 60960050569112225624,156025607439258576501944264, 2960693161885750577087228146201160, 416501345588614541672537137056124519706624] |