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| n | a(n) |
|---|---|
| 1 | 10686 |
| 2 | 114190596 |
| 3 | 268686202446 |
| 4 | 895547972671398 |
| 5 | 2920423120381462040 |
[10686,114190596,268686202446,895547972671398, 2920423120381462040] |