The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 66 |
| 3 | 469 |
| 4 | 2821 |
| 5 | 15350 |
| 6 | 76848 |
| 7 | 381729 |
| 8 | 1904232 |
| 9 | 9396562 |
| 10 | 45298610 |
[6,66,469,2821,15350,76848,381729,1904232,9396562, 45298610] |