The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 4 | 28 |
| 5 | 3385 |
| 6 | 134353 |
| 7 | 1958674 |
| 8 | 19929645 |
| 9 | 138586349 |
| 10 | 753795278 |
| 11 | 3356614240 |
| 12 | 13108210508 |
| 13 | 44374441652 |
| 14 | 137349454120 |
[28,3385,134353,1958674,19929645,138586349, 753795278,3356614240,13108210508,44374441652, 137349454120] |