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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 12 |
| 3 | 2512 |
| 4 | 781252512 |
| 5 | 976562500000000781252512 |
| 6 | 976562500000000000000000000000000000000000000976562500000000781252512 |
[2,12,2512,781252512,976562500000000781252512, 97656250000000000000000000000000000000000000097656\ 2500000000781252512] |