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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 14 |
| 5 | 24 |
| 6 | 42 |
| 7 | 72 |
| 8 | 126 |
| 9 | 228 |
| 10 | 420 |
| 11 | 792 |
| 12 | 1522 |
| 13 | 2948 |
| 14 | 5740 |
| 15 | 11200 |
| 16 | 21834 |
| 17 | 42524 |
| 18 | 82756 |
| 19 | 160960 |
| 20 | 313128 |
| 21 | 609624 |
| 22 | 1188180 |
| 23 | 2318976 |
| 24 | 4532442 |
| 25 | 8870628 |
| 26 | 17382264 |
| 27 | 34096896 |
| 28 | 66942960 |
| 29 | 131526888 |
| 30 | 258579828 |
| 31 | 508638768 |
| 32 | 1001004306 |
| 33 | 1970877540 |
[1,2,4,8,14,24,42,72,126,228,420,792,1522,2948, 5740,11200,21834,42524,82756,160960,313128,609624, 1188180,2318976,4532442,8870628,17382264,34096896, 66942960,131526888,258579828,508638768,1001004306, 1970877540] |