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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 46 |
| 5 | 205 |
| 6 | 962 |
| 7 | 4668 |
| 8 | 23268 |
| 9 | 118374 |
| 10 | 612305 |
| 11 | 3210348 |
| 12 | 17023682 |
| 13 | 91140496 |
| 14 | 491968036 |
| 15 | 2674572509 |
| 16 | 14631157562 |
| 17 | 80480706331 |
| 18 | 444865534251 |
| 19 | 2469826058736 |
| 20 | 13766223517639 |
| 21 | 77003660186990 |
| 22 | 432131032213098 |
| 23 | 2432230966070833 |
| 24 | 13726899289265314 |
[1,1,3,11,46,205,962,4668,23268,118374,612305, 3210348,17023682,91140496,491968036,2674572509, 14631157562,80480706331,444865534251, 2469826058736,13766223517639,77003660186990, 432131032213098,2432230966070833, 13726899289265314] |