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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 4 |
| 7 | 9 |
| 8 | 17 |
| 9 | 29 |
| 10 | 45 |
| 11 | 66 |
| 12 | 89 |
| 13 | 118 |
| 14 | 142 |
| 15 | 171 |
| 16 | 187 |
| 17 | 205 |
| 18 | 202 |
| 19 | 201 |
| 20 | 177 |
| 21 | 158 |
| 22 | 123 |
| 23 | 99 |
| 24 | 66 |
| 25 | 47 |
| 26 | 26 |
| 27 | 17 |
| 28 | 7 |
| 29 | 4 |
| 30 | 1 |
| 31 | 1 |
[0,0,0,0,0,1,4,9,17,29,45,66,89,118,142,171,187, 205,202,201,177,158,123,99,66,47,26,17,7,4,1,1] |