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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 5 |
| 6 | 4 |
| 7 | 4 |
| 8 | 15 |
| 9 | 16 |
| 10 | 24 |
| 11 | 33 |
| 12 | 56 |
| 13 | 72 |
| 14 | 95 |
| 15 | 149 |
| 16 | 219 |
| 17 | 322 |
| 18 | 537 |
| 19 | 655 |
| 20 | 998 |
| 21 | 1309 |
| 22 | 1859 |
| 23 | 2784 |
| 24 | 3886 |
| 25 | 5340 |
| 26 | 8091 |
| 27 | 10718 |
| 28 | 16191 |
| 29 | 22316 |
| 30 | 30372 |
| 31 | 43425 |
| 32 | 63699 |
| 33 | 88186 |
[0,0,0,2,5,4,4,15,16,24,33,56,72,95,149,219,322, 537,655,998,1309,1859,2784,3886,5340,8091,10718, 16191,22316,30372,43425,63699,88186] |