| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 4 |
| 2 | 8 |
| 3 | 16 |
| 4 | 64 |
| 5 | 256 |
| 6 | 16384 |
| 7 | 1048576 |
| 8 | 68719476736 |
| 9 | 1152921504606846976 |
| 10 | 324518553658426726783156020576256 |
| 11 | 392318858461667547739736838950479151006397215279002157056 |
[2,4,8,16,64,256,16384,1048576,68719476736, 1152921504606846976, 324518553658426726783156020576256, 39231885846166754773973683895047915100639721527900\ 2157056] |