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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 16 |
| 4 | 128 |
| 5 | 256 |
| 6 | 3072 |
| 7 | 6144 |
| 8 | 98304 |
| 9 | 196608 |
| 10 | 3932160 |
| 11 | 7864320 |
| 12 | 188743680 |
| 13 | 25165824 |
| 14 | 704643072 |
| 15 | 21139292160 |
| 16 | 676457349120 |
| 17 | 1352914698240 |
| 18 | 48704929136640 |
| 19 | 4638564679680 |
| 20 | 185542587187200 |
| 21 | 7792788661862400 |
[2,8,16,128,256,3072,6144,98304,196608,3932160, 7864320,188743680,25165824,704643072,21139292160, 676457349120,1352914698240,48704929136640, 4638564679680,185542587187200,7792788661862400] |