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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 4 |
| 3 | 123 |
| 4 | 16 |
| 5 | 2031 |
| 6 | 64 |
| 7 | 32703 |
| 8 | 256 |
| 9 | 524031 |
| 10 | 1024 |
| 11 | 8387583 |
| 12 | 4096 |
| 13 | 134213631 |
| 14 | 16384 |
| 15 | 2147467263 |
| 16 | 65536 |
| 17 | 34359672831 |
| 18 | 262144 |
| 19 | 549755551743 |
| 20 | 1048576 |
| 21 | 8796091973631 |
| 22 | 4194304 |
| 23 | 140737484161023 |
| 24 | 16777216 |
| 25 | 2251799796908031 |
| 26 | 67108864 |
| 27 | 36028796951855103 |
| 28 | 268435456 |
[1,6,4,123,16,2031,64,32703,256,524031,1024, 8387583,4096,134213631,16384,2147467263,65536, 34359672831,262144,549755551743,1048576, 8796091973631,4194304,140737484161023,16777216, 2251799796908031,67108864,36028796951855103, 268435456] |