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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 7 |
| 5 | 11 |
| 6 | 15 |
| 7 | 18 |
| 8 | 31 |
| 9 | 63 |
| 10 | 75 |
| 11 | 127 |
| 12 | 255 |
| 13 | 511 |
| 14 | 1023 |
| 15 | 1234 |
| 16 | 2047 |
| 17 | 4095 |
| 18 | 8191 |
| 19 | 9638 |
| 20 | 16383 |
| 21 | 32767 |
| 22 | 65535 |
| 23 | 131071 |
| 24 | 262143 |
| 25 | 524287 |
| 26 | 1048575 |
| 27 | 2097151 |
| 28 | 4194303 |
| 29 | 8388607 |
[0,1,2,7,11,15,18,31,63,75,127,255,511,1023,1234, 2047,4095,8191,9638,16383,32767,65535,131071, 262143,524287,1048575,2097151,4194303,8388607] |