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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 16 |
| 5 | 8 |
| 6 | 4096 |
| 7 | 32 |
| 8 | 16384 |
| 9 | 134217728 |
| 10 | 256 |
| 11 | 33554432 |
| 12 | 1073741824 |
| 13 | 2147483648 |
| 14 | 68719476736 |
| 15 | 8192 |
| 16 | 262144 |
| 17 | 2722258935367507707706996859454145691648 |
| 18 | 1152921504606846976 |
| 19 | 10889035741470030830827987437816582766592 |
[1,2,4,16,8,4096,32,16384,134217728,256,33554432, 1073741824,2147483648,68719476736,8192,262144, 2722258935367507707706996859454145691648, 1152921504606846976, 10889035741470030830827987437816582766592] |