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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 15 |
| 4 | 29 |
| 5 | 59 |
| 6 | 125 |
| 7 | 243 |
| 8 | 477 |
| 9 | 931 |
| 10 | 2037 |
| 11 | 3883 |
| 12 | 7669 |
| 13 | 14891 |
| 14 | 32701 |
| 15 | 62347 |
| 16 | 122589 |
| 17 | 237643 |
| 18 | 523469 |
| 19 | 995795 |
| 20 | 1964749 |
| 21 | 3815923 |
| 22 | 8367853 |
| 23 | 15958451 |
| 24 | 31384077 |
| 25 | 60834067 |
| 26 | 133964365 |
| 27 | 254890483 |
| 28 | 502998765 |
| 29 | 976878003 |
| 30 | 2142123533 |
| 31 | 4085328179 |
| 32 | 8034199053 |
[1,3,7,15,29,59,125,243,477,931,2037,3883,7669, 14891,32701,62347,122589,237643,523469,995795, 1964749,3815923,8367853,15958451,31384077, 60834067,133964365,254890483,502998765,976878003, 2142123533,4085328179,8034199053] |