The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 15 |
| 4 | 31 |
| 5 | 15 |
| 6 | 31 |
| 7 | 255 |
| 8 | 511 |
| 9 | 511 |
| 10 | 1023 |
| 11 | 1279 |
| 12 | 2559 |
| 13 | 13823 |
| 14 | 27647 |
| 15 | 59391 |
| 16 | 118783 |
| 17 | 222207 |
| 18 | 444415 |
| 19 | 917503 |
| 20 | 1835007 |
| 21 | 3620863 |
| 22 | 7241727 |
| 23 | 14483455 |
| 24 | 28966911 |
| 25 | 7602175 |
| 26 | 15204351 |
| 27 | 164626431 |
| 28 | 329252863 |
| 29 | 734003199 |
| 30 | 1468006399 |
| 31 | 792723455 |
| 32 | 1585446911 |
| 33 | 14478737407 |
[1,1,3,15,31,15,31,255,511,511,1023,1279,2559, 13823,27647,59391,118783,222207,444415,917503, 1835007,3620863,7241727,14483455,28966911,7602175, 15204351,164626431,329252863,734003199,1468006399, 792723455,1585446911,14478737407] |