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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 5 |
| 5 | 13 |
| 6 | 22 |
| 7 | 45 |
| 8 | 87 |
| 9 | 166 |
| 10 | 329 |
| 11 | 627 |
| 12 | 1232 |
| 13 | 2373 |
| 14 | 4621 |
| 15 | 8956 |
| 16 | 17377 |
| 17 | 33737 |
| 18 | 65422 |
| 19 | 127009 |
| 20 | 246363 |
| 21 | 478134 |
| 22 | 927685 |
| 23 | 1800119 |
| 24 | 3492960 |
| 25 | 6777593 |
| 26 | 13151433 |
| 27 | 25518580 |
| 28 | 49516525 |
| 29 | 96081013 |
| 30 | 186435302 |
| 31 | 361757509 |
| 32 | 701951407 |
| 33 | 1362062118 |
| 34 | 2642933937 |
| 35 | 5128331659 |
[0,1,1,4,5,13,22,45,87,166,329,627,1232,2373,4621, 8956,17377,33737,65422,127009,246363,478134, 927685,1800119,3492960,6777593,13151433,25518580, 49516525,96081013,186435302,361757509,701951407, 1362062118,2642933937,5128331659] |