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| n | a(n) |
|---|---|
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 4 |
| 10 | 6 |
| 11 | 10 |
| 12 | 10 |
| 13 | 14 |
| 14 | 15 |
| 15 | 19 |
| 16 | 21 |
| 17 | 25 |
| 18 | 27 |
| 19 | 32 |
| 20 | 34 |
| 21 | 39 |
| 22 | 42 |
[0,0,1,1,2,4,6,10,10,14,15,19,21,25,27,32,34,39, 42] |