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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 6 |
| 3 | 10 |
| 4 | 15 |
| 5 | 26 |
| 6 | 51 |
| 7 | 95 |
| 8 | 187 |
| 9 | 371 |
| 10 | 737 |
| 11 | 1473 |
| 12 | 2942 |
| 13 | 5878 |
| 14 | 11755 |
| 15 | 23507 |
| 16 | 47013 |
| 17 | 94021 |
| 18 | 188041 |
| 19 | 376069 |
| 20 | 752135 |
| 21 | 1504261 |
| 22 | 3008503 |
| 23 | 6017001 |
| 24 | 12034001 |
| 25 | 24068001 |
| 26 | 48135995 |
| 27 | 96271987 |
| 28 | 192543973 |
| 29 | 385087943 |
| 30 | 770175883 |
| 31 | 1540351763 |
| 32 | 3080703523 |
| 33 | 6161407045 |
| 34 | 12322814089 |
| 35 | 24645628171 |
[4,6,10,15,26,51,95,187,371,737,1473,2942,5878, 11755,23507,47013,94021,188041,376069,752135, 1504261,3008503,6017001,12034001,24068001, 48135995,96271987,192543973,385087943,770175883, 1540351763,3080703523,6161407045,12322814089, 24645628171] |