The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 3 |
| 4 | 24 |
| 5 | 15 |
| 6 | 64 |
| 7 | 127 |
| 8 | 256 |
| 9 | 511 |
| 10 | 1024 |
| 11 | 767 |
| 12 | 4096 |
| 13 | 4095 |
| 14 | 24576 |
| 15 | 8191 |
| 16 | 81920 |
| 17 | 32767 |
| 18 | 262144 |
| 19 | 524287 |
| 20 | 1048576 |
| 21 | 1048575 |
| 22 | 6291456 |
| 23 | 2097151 |
| 24 | 20971520 |
| 25 | 20971519 |
| 26 | 75497472 |
| 27 | 36700159 |
| 28 | 419430400 |
| 29 | 100663295 |
| 30 | 1140850688 |
| 31 | 1929379839 |
| 32 | 4596957184 |
| 33 | 3288334335 |
[1,1,4,3,24,15,64,127,256,511,1024,767,4096,4095, 24576,8191,81920,32767,262144,524287,1048576, 1048575,6291456,2097151,20971520,20971519, 75497472,36700159,419430400,100663295,1140850688, 1929379839,4596957184,3288334335] |