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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 7 |
| 4 | 15 |
| 5 | 39 |
| 6 | 95 |
| 7 | 151 |
| 8 | 271 |
| 9 | 583 |
| 10 | 1343 |
| 11 | 2551 |
| 12 | 4719 |
| 13 | 9383 |
| 14 | 20127 |
| 15 | 40535 |
| 16 | 78287 |
| 17 | 153351 |
| 18 | 314367 |
| 19 | 638647 |
| 20 | 1264943 |
| 21 | 2491751 |
| 22 | 5006687 |
| 23 | 10115863 |
| 24 | 20235407 |
| 25 | 40169415 |
| 26 | 80222911 |
| 27 | 161149815 |
| 28 | 323033071 |
| 29 | 644388391 |
| 30 | 1286171679 |
| 31 | 2575370199 |
[1,3,7,7,15,39,95,151,271,583,1343,2551,4719,9383, 20127,40535,78287,153351,314367,638647,1264943, 2491751,5006687,10115863,20235407,40169415, 80222911,161149815,323033071,644388391,1286171679, 2575370199] |