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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 18 |
| 4 | 40 |
| 5 | 81 |
| 6 | 153 |
| 7 | 276 |
| 8 | 482 |
| 9 | 823 |
| 10 | 1383 |
| 11 | 2298 |
| 12 | 3788 |
| 13 | 6209 |
| 14 | 10137 |
| 15 | 16505 |
| 16 | 26821 |
| 17 | 43526 |
| 18 | 70569 |
| 19 | 114340 |
| 20 | 185178 |
| 21 | 299812 |
| 22 | 485310 |
| 23 | 785469 |
| 24 | 1271154 |
| 25 | 2057027 |
| 26 | 3328615 |
| 27 | 5386107 |
| 28 | 8715219 |
| 29 | 14101856 |
| 30 | 22817639 |
| 31 | 36920094 |
| 32 | 59738368 |
| 33 | 96659134 |
[1,2,7,18,40,81,153,276,482,823,1383,2298,3788, 6209,10137,16505,26821,43526,70569,114340,185178, 299812,485310,785469,1271154,2057027,3328615, 5386107,8715219,14101856,22817639,36920094, 59738368,96659134] |