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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 28 |
| 7 | 53 |
| 8 | 105 |
| 9 | 211 |
| 10 | 413 |
| 11 | 819 |
| 12 | 1624 |
| 13 | 3206 |
| 14 | 6349 |
| 15 | 12565 |
| 16 | 24851 |
| 17 | 49183 |
| 18 | 97315 |
| 19 | 192539 |
| 20 | 380989 |
| 21 | 753836 |
| 22 | 1491567 |
| 23 | 2951330 |
| 24 | 5839638 |
| 25 | 11554621 |
| 26 | 22862658 |
| 27 | 45237262 |
| 28 | 89508951 |
| 29 | 177107406 |
| 30 | 350434385 |
| 31 | 693388850 |
| 32 | 1371977475 |
| 33 | 2714670141 |
| 34 | 5371396171 |
[1,1,1,4,7,13,28,53,105,211,413,819,1624,3206, 6349,12565,24851,49183,97315,192539,380989,753836, 1491567,2951330,5839638,11554621,22862658, 45237262,89508951,177107406,350434385,693388850, 1371977475,2714670141,5371396171] |