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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 27 |
| 6 | 58 |
| 7 | 120 |
| 8 | 245 |
| 9 | 498 |
| 10 | 1006 |
| 11 | 2024 |
| 12 | 4064 |
| 13 | 8149 |
| 14 | 16327 |
| 15 | 32692 |
| 16 | 65435 |
| 17 | 130938 |
| 18 | 261966 |
| 19 | 524051 |
| 20 | 1048260 |
| 21 | 2096731 |
| 22 | 4193743 |
| 23 | 8387860 |
| 24 | 16776219 |
| 25 | 33553102 |
| 26 | 67107091 |
| 27 | 134215365 |
| 28 | 268432305 |
| 29 | 536866711 |
| 30 | 1073736223 |
| 31 | 2147476181 |
[2,5,12,27,58,120,245,498,1006,2024,4064,8149, 16327,32692,65435,130938,261966,524051,1048260, 2096731,4193743,8387860,16776219,33553102, 67107091,134215365,268432305,536866711,1073736223, 2147476181] |