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| n | a(n) |
|---|---|
| 0 | -1 |
| 1 | -1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 19 |
| 5 | 33 |
| 6 | 62 |
| 7 | 125 |
| 8 | 255 |
| 9 | 514 |
| 10 | 1027 |
| 11 | 2049 |
| 12 | 4094 |
| 13 | 8189 |
| 14 | 16383 |
| 15 | 32770 |
| 16 | 65539 |
| 17 | 131073 |
| 18 | 262142 |
| 19 | 524285 |
| 20 | 1048575 |
| 21 | 2097154 |
| 22 | 4194307 |
| 23 | 8388609 |
| 24 | 16777214 |
| 25 | 33554429 |
| 26 | 67108863 |
| 27 | 134217730 |
| 28 | 268435459 |
| 29 | 536870913 |
| 30 | 1073741822 |
| 31 | 2147483645 |
| 32 | 4294967295 |
| 33 | 8589934594 |
| 34 | 17179869187 |
[-1,-1,3,10,19,33,62,125,255,514,1027,2049,4094, 8189,16383,32770,65539,131073,262142,524285, 1048575,2097154,4194307,8388609,16777214,33554429, 67108863,134217730,268435459,536870913,1073741822, 2147483645,4294967295,8589934594,17179869187] |