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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 10 |
| 9 | 39 |
| 10 | 99 |
| 11 | 115 |
| 12 | 158 |
| 13 | 697 |
| 14 | 966 |
| 15 | 2602 |
| 16 | 2899 |
| 17 | 4057 |
| 18 | 5226 |
| 19 | 8279 |
| 20 | 17946 |
| 21 | 44850 |
[0,1,2,3,5,6,7,10,39,99,115,158,697,966,2602,2899, 4057,5226,8279,17946,44850] |