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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 28 |
| 3 | 3126 |
| 4 | 823544 |
| 5 | 387420490 |
| 6 | 285311670612 |
| 7 | 302875106592254 |
| 8 | 437893890380859376 |
| 9 | 827240261886336764178 |
| 10 | 1978419655660313589123980 |
| 11 | 5842587018385982521381124422 |
| 12 | 20880467999847912034355032910568 |
| 13 | 88817841970012523233890533447265626 |
[2,28,3126,823544,387420490,285311670612, 302875106592254,437893890380859376, 827240261886336764178,1978419655660313589123980, 5842587018385982521381124422, 20880467999847912034355032910568, 88817841970012523233890533447265626] |