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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 2 | 5 |
| 3 | 25 |
| 4 | 15 |
| 5 | 95 |
| 6 | 65 |
| 7 | 385 |
| 8 | 255 |
| 9 | 1535 |
| 10 | 1025 |
| 11 | 6145 |
| 12 | 4095 |
| 13 | 24575 |
| 14 | 16385 |
| 15 | 98305 |
| 16 | 65535 |
| 17 | 393215 |
| 18 | 262145 |
| 19 | 1572865 |
| 20 | 1048575 |
| 21 | 6291455 |
| 22 | 4194305 |
| 23 | 25165825 |
| 24 | 16777215 |
| 25 | 100663295 |
| 26 | 67108865 |
| 27 | 402653185 |
| 28 | 268435455 |
| 29 | 1610612735 |
| 30 | 1073741825 |
| 31 | 6442450945 |
| 32 | 4294967295 |
| 33 | 25769803775 |
[5,25,15,95,65,385,255,1535,1025,6145,4095,24575, 16385,98305,65535,393215,262145,1572865,1048575, 6291455,4194305,25165825,16777215,100663295, 67108865,402653185,268435455,1610612735, 1073741825,6442450945,4294967295,25769803775] |