The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 112 |
| 3 | 544 |
| 4 | 3637 |
| 5 | 37179 |
| 6 | 256713 |
| 7 | 1898178 |
| 8 | 16087936 |
| 9 | 121741279 |
| 10 | 933686077 |
| 11 | 7473862911 |
| 12 | 57912910897 |
| 13 | 449682762989 |
| 14 | 3538407928642 |
| 15 | 27585262869841 |
| 16 | 215073549972468 |
| 17 | 1683740352779281 |
| 18 | 13146690679835447 |
| 19 | 102637633797615262 |
[6,112,544,3637,37179,256713,1898178,16087936, 121741279,933686077,7473862911,57912910897, 449682762989,3538407928642,27585262869841, 215073549972468,1683740352779281, 13146690679835447,102637633797615262] |