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| n | a(n) |
|---|---|
| 1 | 90 |
| 2 | 10109 |
| 3 | 13948153 |
| 4 | 215433191774 |
| 5 | 36832573887843946 |
| 6 | 71462394089059338306691 |
[90,10109,13948153,215433191774,36832573887843946, 71462394089059338306691] |