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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 225 |
| 3 | 1225 |
| 4 | 81225 |
| 5 | 16281225 |
| 6 | 7077116281225 |
| 7 | 1642681227077116281225 |
[25,225,1225,81225,16281225,7077116281225, 1642681227077116281225] |