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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 38 |
| 4 | 196 |
| 5 | 1062 |
| 6 | 5948 |
| 7 | 34120 |
| 8 | 199316 |
| 9 | 1181126 |
| 10 | 7080928 |
| 11 | 42860534 |
| 12 | 261542752 |
| 13 | 1607076200 |
| 14 | 9934255472 |
| 15 | 61732449648 |
| 16 | 385393229460 |
| 17 | 2415935640198 |
| 18 | 15200964233864 |
| 19 | 95962904716402 |
| 20 | 607640599286276 |
| 21 | 3858198001960438 |
| 22 | 24559243585545644 |
| 23 | 156692889782067712 |
[1,2,8,38,196,1062,5948,34120,199316,1181126, 7080928,42860534,261542752,1607076200,9934255472, 61732449648,385393229460,2415935640198, 15200964233864,95962904716402,607640599286276, 3858198001960438,24559243585545644, 156692889782067712] |