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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 14 |
| 4 | 15 |
| 5 | 55 |
| 6 | 95 |
| 7 | 247 |
| 8 | 447 |
| 9 | 511 |
| 10 | 1535 |
| 11 | 2047 |
| 12 | 7167 |
| 13 | 12287 |
| 14 | 32255 |
| 15 | 49151 |
| 16 | 98303 |
| 17 | 196607 |
| 18 | 393215 |
| 19 | 983039 |
| 20 | 1572863 |
| 21 | 3145727 |
| 22 | 6291455 |
| 23 | 8388607 |
| 24 | 33423359 |
| 25 | 50331647 |
| 26 | 117440511 |
| 27 | 201326591 |
| 28 | 528482303 |
| 29 | 805306367 |
| 30 | 1879048191 |
| 31 | 3221225471 |
[4,6,14,15,55,95,247,447,511,1535,2047,7167,12287, 32255,49151,98303,196607,393215,983039,1572863, 3145727,6291455,8388607,33423359,50331647, 117440511,201326591,528482303,805306367, 1879048191,3221225471] |