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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 4 |
| 3 | 119 |
| 4 | 16 |
| 5 | 2015 |
| 6 | 64 |
| 7 | 32639 |
| 8 | 256 |
| 9 | 523775 |
| 10 | 1024 |
| 11 | 8386559 |
| 12 | 4096 |
| 13 | 134209535 |
| 14 | 16384 |
| 15 | 2147450879 |
| 16 | 65536 |
| 17 | 34359607295 |
| 18 | 262144 |
| 19 | 549755289599 |
| 20 | 1048576 |
| 21 | 8796090925055 |
| 22 | 4194304 |
| 23 | 140737479966719 |
| 24 | 16777216 |
| 25 | 2251799780130815 |
| 26 | 67108864 |
| 27 | 36028796884746239 |
| 28 | 268435456 |
[1,5,4,119,16,2015,64,32639,256,523775,1024, 8386559,4096,134209535,16384,2147450879,65536, 34359607295,262144,549755289599,1048576, 8796090925055,4194304,140737479966719,16777216, 2251799780130815,67108864,36028796884746239, 268435456] |