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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 3 |
| 7 | 1 |
| 8 | 4 |
| 9 | 4 |
| 10 | 8 |
| 11 | 9 |
| 12 | 15 |
| 13 | 17 |
| 14 | 25 |
| 15 | 30 |
| 16 | 43 |
| 17 | 54 |
| 18 | 72 |
| 19 | 87 |
| 20 | 115 |
| 21 | 139 |
| 22 | 181 |
| 23 | 224 |
| 24 | 283 |
| 25 | 342 |
| 26 | 429 |
| 27 | 519 |
| 28 | 647 |
| 29 | 779 |
| 30 | 967 |
[0,0,0,0,1,0,3,1,4,4,8,9,15,17,25,30,43,54,72,87, 115,139,181,224,283,342,429,519,647,779,967] |