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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 5 |
| 6 | 10 |
| 7 | 20 |
| 8 | 34 |
| 9 | 43 |
| 10 | 70 |
| 11 | 85 |
| 12 | 138 |
| 13 | 205 |
| 14 | 574 |
| 15 | 1378 |
| 16 | 1512 |
| 17 | 1770 |
| 18 | 2434 |
| 19 | 3073 |
| 20 | 3330 |
| 21 | 29443 |
| 22 | 76840 |
| 23 | 122203 |
| 24 | 142932 |
| 25 | 176908 |
[0,1,2,4,5,10,20,34,43,70,85,138,205,574,1378, 1512,1770,2434,3073,3330,29443,76840,122203, 142932,176908] |