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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 18 |
| 3 | 43 |
| 4 | 156 |
| 5 | 601 |
| 6 | 2006 |
| 7 | 7383 |
| 8 | 25400 |
| 9 | 89693 |
| 10 | 315334 |
| 11 | 1103371 |
| 12 | 3871860 |
| 13 | 13540353 |
| 14 | 47310262 |
| 15 | 165104587 |
| 16 | 575109252 |
| 17 | 2000994373 |
| 18 | 6951376238 |
| 19 | 24117548401 |
| 20 | 83567966688 |
| 21 | 289210301055 |
| 22 | 999751444526 |
| 23 | 3452205326385 |
| 24 | 11908457582008 |
[8,18,43,156,601,2006,7383,25400,89693,315334, 1103371,3871860,13540353,47310262,165104587, 575109252,2000994373,6951376238,24117548401, 83567966688,289210301055,999751444526, 3452205326385,11908457582008] |