The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 14 |
| 3 | 50 |
| 4 | 238 |
| 5 | 1123 |
| 6 | 5792 |
| 7 | 30598 |
| 8 | 166056 |
| 9 | 927639 |
| 10 | 5308458 |
| 11 | 30984757 |
[4,14,50,238,1123,5792,30598,166056,927639, 5308458,30984757] |