The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 7 |
| 7 | 19 |
| 8 | 37 |
| 9 | 67 |
| 10 | 231 |
| 11 | 1339 |
| 12 | 8869 |
| 13 | 45413 |
| 14 | 237925 |
| 15 | 1625066 |
| 16 | 15388021 |
| 17 | 179623547 |
| 18 | 2180692829 |
| 19 | 28227148274 |
| 20 | 428766984919 |
[1,7,19,37,67,231,1339,8869,45413,237925,1625066, 15388021,179623547,2180692829,28227148274, 428766984919] |