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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 6 |
| 7 | 10 |
| 8 | 15 |
| 9 | 22 |
| 10 | 32 |
| 11 | 47 |
| 12 | 71 |
| 13 | 106 |
| 14 | 156 |
| 15 | 227 |
| 16 | 328 |
| 17 | 473 |
| 18 | 683 |
| 19 | 986 |
| 20 | 1421 |
| 21 | 2040 |
| 22 | 2916 |
| 23 | 4149 |
[1,1,1,2,3,4,6,10,15,22,32,47,71,106,156,227,328, 473,683,986,1421,2040,2916,4149] |