| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 22 |
| 5 | 63 |
| 6 | 238 |
| 7 | 865 |
| 8 | 3417 |
| 9 | 13607 |
| 10 | 55669 |
| 11 | 230581 |
| 12 | 968550 |
| 13 | 4108547 |
| 14 | 17589348 |
| 15 | 75872175 |
| 16 | 329480644 |
| 17 | 1439151627 |
| 18 | 6318822750 |
| 19 | 27872030921 |
| 20 | 123452835089 |
[1,3,5,22,63,238,865,3417,13607,55669,230581, 968550,4108547,17589348,75872175,329480644, 1439151627,6318822750,27872030921,123452835089] |