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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 70 |
| 3 | 34650 |
| 4 | 62762200 |
| 5 | 301052578040 |
| 6 | 3154731367686570 |
| 7 | 63520913228252004621 |
[1,70,34650,62762200,301052578040, 3154731367686570,63520913228252004621] |