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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 7 |
| 3 | 4 |
| 4 | 31 |
| 5 | 20 |
| 6 | 127 |
| 7 | 84 |
| 8 | 511 |
| 9 | 340 |
| 10 | 2047 |
| 11 | 1364 |
| 12 | 8191 |
| 13 | 5460 |
| 14 | 32767 |
| 15 | 21844 |
| 16 | 131071 |
| 17 | 87380 |
| 18 | 524287 |
| 19 | 349524 |
| 20 | 2097151 |
| 21 | 1398100 |
| 22 | 8388607 |
| 23 | 5592404 |
| 24 | 33554431 |
| 25 | 22369620 |
| 26 | 134217727 |
| 27 | 89478484 |
| 28 | 536870911 |
| 29 | 357913940 |
| 30 | 2147483647 |
| 31 | 1431655764 |
| 32 | 8589934591 |
| 33 | 5726623060 |
[1,0,7,4,31,20,127,84,511,340,2047,1364,8191,5460, 32767,21844,131071,87380,524287,349524,2097151, 1398100,8388607,5592404,33554431,22369620, 134217727,89478484,536870911,357913940,2147483647, 1431655764,8589934591,5726623060] |