The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 3 |
| 4 | 275 |
| 5 | 5062 |
| 6 | 405065 |
| 7 | 48703999 |
| 8 | 11304892092 |
| 9 | 9455531359836 |
| 10 | 13086658688226332 |
[1,4,3,275,5062,405065,48703999,11304892092, 9455531359836,13086658688226332] |