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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 7 |
| 4 | 23 |
| 5 | 63 |
| 6 | 127 |
| 7 | 63 |
| 8 | 511 |
| 9 | 959 |
| 10 | 1791 |
| 11 | 4095 |
| 12 | 8191 |
| 13 | 15871 |
| 14 | 26623 |
| 15 | 16383 |
| 16 | 114687 |
| 17 | 253951 |
| 18 | 411647 |
| 19 | 1015807 |
| 20 | 2007039 |
| 21 | 3506175 |
| 22 | 8126463 |
| 23 | 14385151 |
| 24 | 33521663 |
| 25 | 67108863 |
| 26 | 133627903 |
| 27 | 268435455 |
| 28 | 486408191 |
| 29 | 1041235967 |
| 30 | 2080112639 |
| 31 | 1879048191 |
| 32 | 5366611967 |
[1,1,7,7,23,63,127,63,511,959,1791,4095,8191, 15871,26623,16383,114687,253951,411647,1015807, 2007039,3506175,8126463,14385151,33521663, 67108863,133627903,268435455,486408191,1041235967, 2080112639,1879048191,5366611967] |