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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 10 |
| 7 | 14 |
| 8 | 34 |
| 9 | 48 |
| 10 | 116 |
| 11 | 164 |
| 12 | 396 |
| 13 | 560 |
| 14 | 1352 |
| 15 | 1912 |
| 16 | 4616 |
| 17 | 6528 |
| 18 | 15760 |
| 19 | 22288 |
| 20 | 53808 |
| 21 | 76096 |
| 22 | 183712 |
| 23 | 259808 |
| 24 | 627232 |
| 25 | 887040 |
| 26 | 2141504 |
| 27 | 3028544 |
| 28 | 7311552 |
| 29 | 10340096 |
| 30 | 24963200 |
| 31 | 35303296 |
| 32 | 85229696 |
| 33 | 120532992 |
| 34 | 290992384 |
| 35 | 411525376 |
| 36 | 993510144 |
| 37 | 1405035520 |
[0,1,1,3,4,10,14,34,48,116,164,396,560,1352,1912, 4616,6528,15760,22288,53808,76096,183712,259808, 627232,887040,2141504,3028544,7311552,10340096, 24963200,35303296,85229696,120532992,290992384, 411525376,993510144,1405035520] |