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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 16 |
| 3 | 63 |
| 4 | 256 |
| 5 | 1023 |
| 6 | 4096 |
| 7 | 16383 |
| 8 | 65536 |
| 9 | 262143 |
| 10 | 1048576 |
| 11 | 4194303 |
| 12 | 16777216 |
| 13 | 67108863 |
| 14 | 268435456 |
| 15 | 1073741823 |
| 16 | 4294967296 |
| 17 | 17179869183 |
| 18 | 68719476736 |
| 19 | 274877906943 |
| 20 | 1099511627776 |
| 21 | 4398046511103 |
| 22 | 17592186044416 |
| 23 | 70368744177663 |
| 24 | 281474976710656 |
[1,3,16,63,256,1023,4096,16383,65536,262143, 1048576,4194303,16777216,67108863,268435456, 1073741823,4294967296,17179869183,68719476736, 274877906943,1099511627776,4398046511103, 17592186044416,70368744177663,281474976710656] |