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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 15 |
| 4 | 15 |
| 5 | 47 |
| 6 | 63 |
| 7 | 191 |
| 8 | 255 |
| 9 | 575 |
| 10 | 1023 |
| 11 | 4095 |
| 12 | 511 |
| 13 | 16383 |
| 14 | 32767 |
| 15 | 16383 |
| 16 | 131071 |
| 17 | 246783 |
| 18 | 131071 |
| 19 | 1048575 |
| 20 | 1974271 |
| 21 | 4194303 |
| 22 | 8126463 |
| 23 | 16515071 |
| 24 | 32505855 |
| 25 | 66060287 |
| 26 | 130023423 |
| 27 | 264241151 |
| 28 | 520093695 |
| 29 | 1056964607 |
| 30 | 2080374783 |
| 31 | 4227858431 |
| 32 | 8321499135 |
[1,1,3,15,15,47,63,191,255,575,1023,4095,511, 16383,32767,16383,131071,246783,131071,1048575, 1974271,4194303,8126463,16515071,32505855, 66060287,130023423,264241151,520093695,1056964607, 2080374783,4227858431,8321499135] |