| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 53 |
| 3 | 117 |
| 4 | 245 |
| 5 | 501 |
| 6 | 1013 |
| 7 | 2037 |
| 8 | 4085 |
| 9 | 8181 |
| 10 | 16373 |
| 11 | 32757 |
| 12 | 65525 |
| 13 | 131061 |
| 14 | 262133 |
| 15 | 524277 |
| 16 | 1048565 |
| 17 | 2097141 |
| 18 | 4194293 |
| 19 | 8388597 |
| 20 | 16777205 |
| 21 | 33554421 |
| 22 | 67108853 |
| 23 | 134217717 |
| 24 | 268435445 |
| 25 | 536870901 |
| 26 | 1073741813 |
| 27 | 2147483637 |
| 28 | 4294967285 |
| 29 | 8589934581 |
| 30 | 17179869173 |
| 31 | 34359738357 |
| 32 | 68719476725 |
| 33 | 137438953461 |
| 34 | 274877906933 |
| 35 | 549755813877 |
[21,53,117,245,501,1013,2037,4085,8181,16373, 32757,65525,131061,262133,524277,1048565,2097141, 4194293,8388597,16777205,33554421,67108853, 134217717,268435445,536870901,1073741813, 2147483637,4294967285,8589934581,17179869173, 34359738357,68719476725,137438953461,274877906933, 549755813877] |