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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 6 |
| 6 | 10 |
| 7 | 15 |
| 8 | 29 |
| 9 | 30 |
| 10 | 58 |
| 11 | 87 |
| 12 | 145 |
| 13 | 174 |
| 14 | 290 |
| 15 | 435 |
| 16 | 870 |
[1,2,3,5,6,10,15,29,30,58,87,145,174,290,435,870] |