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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 20 |
| 5 | 31 |
| 6 | 88 |
| 7 | 127 |
| 8 | 464 |
| 9 | 511 |
| 10 | 1632 |
| 11 | 2047 |
| 12 | 8000 |
| 13 | 8191 |
| 14 | 31104 |
| 15 | 32767 |
| 16 | 124160 |
| 17 | 131071 |
| 18 | 517632 |
| 19 | 524287 |
| 20 | 2094080 |
| 21 | 2097151 |
| 22 | 8361984 |
| 23 | 8388607 |
| 24 | 33443840 |
| 25 | 31981567 |
| 26 | 134111232 |
| 27 | 134217727 |
| 28 | 536821760 |
| 29 | 436207615 |
| 30 | 2147057664 |
| 31 | 1744830463 |
| 32 | 8588165120 |
| 33 | 6576668671 |
[1,1,6,7,20,31,88,127,464,511,1632,2047,8000,8191, 31104,32767,124160,131071,517632,524287,2094080, 2097151,8361984,8388607,33443840,31981567, 134111232,134217727,536821760,436207615, 2147057664,1744830463,8588165120,6576668671] |