The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 29 |
| 4 | 141 |
| 5 | 789 |
| 6 | 4353 |
| 7 | 24173 |
| 8 | 134679 |
| 9 | 756947 |
| 10 | 4258210 |
| 11 | 23958106 |
[1,6,29,141,789,4353,24173,134679,756947,4258210, 23958106] |