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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 4096 |
| 6 | 65536 |
| 7 | 262144 |
| 8 | 1073741824 |
| 9 | 1152921504606846976 |
| 10 | 309485009821345068724781056 |
| 11 | 81129638414606681695789005144064 |
| 12 | 85070591730234615865843651857942052864 |
[2,4,16,64,4096,65536,262144,1073741824, 1152921504606846976,309485009821345068724781056, 81129638414606681695789005144064, 85070591730234615865843651857942052864] |