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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 30 |
| 6 | 58 |
| 7 | 112 |
| 8 | 216 |
| 9 | 419 |
| 10 | 815 |
| 11 | 1584 |
| 12 | 3082 |
| 13 | 6000 |
| 14 | 11680 |
| 15 | 22748 |
| 16 | 44328 |
| 17 | 86417 |
| 18 | 168560 |
| 19 | 328965 |
| 20 | 642336 |
| 21 | 1254855 |
| 22 | 2452677 |
| 23 | 4796160 |
| 24 | 9383194 |
| 25 | 18365759 |
| 26 | 35963669 |
| 27 | 70455176 |
| 28 | 138086900 |
| 29 | 270756554 |
| 30 | 531115250 |
| 31 | 1042265188 |
| 32 | 2046178828 |
| 33 | 4018658391 |
[1,2,4,8,16,30,58,112,216,419,815,1584,3082,6000, 11680,22748,44328,86417,168560,328965,642336, 1254855,2452677,4796160,9383194,18365759,35963669, 70455176,138086900,270756554,531115250,1042265188, 2046178828,4018658391] |