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| n | a(n) |
|---|---|
| 0 | 4 |
| 1 | 6 |
| 2 | 26 |
| 3 | 126 |
| 4 | 3126 |
| 5 | 15625001 |
| 6 | 156250000000001 |
| 7 | 15625000000000000000000000001 |
| 8 | 156250000000000000000000000000000000000000000000000000001 |
| 9 | 156250000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 |
[4,6,26,126,3126,15625001,156250000000001, 15625000000000000000000000001, 15625000000000000000000000000000000000000000000000\ 0000001, 15625000000000000000000000000000000000000000000000\ 00000000000000000000000000000000000000000000000000\ 00000000000001] |