The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 8 |
| 3 | 80 |
| 4 | 800 |
| 5 | 8576 |
| 6 | 92672 |
| 7 | 1009664 |
| 8 | 11018240 |
| 9 | 120356864 |
| 10 | 1315045376 |
| 11 | 14370209792 |
| 12 | 157036838912 |
| 13 | 1716116258816 |
| 14 | 18754008252416 |
| 15 | 204947383648256 |
| 16 | 2239705722650624 |
| 17 | 24475955615498240 |
| 18 | 267478202279002112 |
[3,8,80,800,8576,92672,1009664,11018240,120356864, 1315045376,14370209792,157036838912,1716116258816, 18754008252416,204947383648256,2239705722650624, 24475955615498240,267478202279002112] |