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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 6 |
| 2 | 26 |
| 3 | 126 |
| 4 | 6251 |
| 5 | 62500001 |
| 6 | 6250000000000001 |
| 7 | 6250000000000000000000000000001 |
| 8 | 62500000000000000000000000000000000000000000000000000000000001 |
[2,6,26,126,6251,62500001,6250000000000001, 6250000000000000000000000000001, 62500000000000000000000000000000000000000000000000\ 000000000001] |