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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 11 |
| 4 | 7 |
| 5 | 47 |
| 6 | 31 |
| 7 | 191 |
| 8 | 127 |
| 9 | 767 |
| 10 | 511 |
| 11 | 3071 |
| 12 | 2047 |
| 13 | 12287 |
| 14 | 8191 |
| 15 | 49151 |
| 16 | 32767 |
| 17 | 196607 |
| 18 | 131071 |
| 19 | 786431 |
| 20 | 524287 |
| 21 | 3145727 |
| 22 | 2097151 |
| 23 | 12582911 |
| 24 | 8388607 |
| 25 | 50331647 |
| 26 | 33554431 |
| 27 | 201326591 |
| 28 | 134217727 |
| 29 | 805306367 |
| 30 | 536870911 |
| 31 | 3221225471 |
| 32 | 2147483647 |
| 33 | 12884901887 |
[1,1,5,11,7,47,31,191,127,767,511,3071,2047,12287, 8191,49151,32767,196607,131071,786431,524287, 3145727,2097151,12582911,8388607,50331647, 33554431,201326591,134217727,805306367,536870911, 3221225471,2147483647,12884901887] |