The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 11 |
| 7 | 1 |
| 8 | 42 |
| 9 | 64 |
| 10 | 202 |
| 11 | 1 |
| 12 | 1557 |
| 13 | 1 |
| 14 | 5539 |
| 15 | 32298 |
| 16 | 30666 |
| 17 | 1 |
| 18 | 405200 |
| 19 | 1 |
| 20 | 1035642 |
[1,2,1,11,1,42,64,202,1,1557,1,5539,32298,30666,1, 405200,1,1035642] |