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| n | a(n) |
|---|---|
| 1 | 48 |
| 2 | 263 |
| 3 | 1548 |
| 4 | 9654 |
| 5 | 61978 |
| 6 | 405702 |
| 7 | 2686876 |
| 8 | 17926060 |
| 9 | 120146998 |
| 10 | 807610262 |
| 11 | 5438698312 |
| 12 | 36669657896 |
| 13 | 247432193154 |
| 14 | 1670424338586 |
| 15 | 11280890946852 |
| 16 | 76200323465372 |
| 17 | 514795456961870 |
| 18 | 3478208969481038 |
| 19 | 23502035785763264 |
[48,263,1548,9654,61978,405702,2686876,17926060, 120146998,807610262,5438698312,36669657896, 247432193154,1670424338586,11280890946852, 76200323465372,514795456961870,3478208969481038, 23502035785763264] |