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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 10 |
| 3 | 9 |
| 4 | 25 |
| 5 | 33 |
| 6 | 65 |
| 7 | 129 |
| 8 | 385 |
| 9 | 513 |
| 10 | 1025 |
| 11 | 2049 |
| 12 | 4097 |
| 13 | 8193 |
| 14 | 16385 |
| 15 | 32769 |
| 16 | 98305 |
| 17 | 131073 |
| 18 | 262145 |
| 19 | 524289 |
| 20 | 1048577 |
| 21 | 2097153 |
| 22 | 4194305 |
| 23 | 8388609 |
| 24 | 16777217 |
| 25 | 33554433 |
| 26 | 67108865 |
| 27 | 134217729 |
| 28 | 268435457 |
| 29 | 536870913 |
| 30 | 1073741825 |
| 31 | 2147483649 |
[4,10,9,25,33,65,129,385,513,1025,2049,4097,8193, 16385,32769,98305,131073,262145,524289,1048577, 2097153,4194305,8388609,16777217,33554433, 67108865,134217729,268435457,536870913,1073741825, 2147483649] |