The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 71 |
| 5 | 1026 |
| 6 | 30912 |
| 7 | 2219946 |
| 8 | 339460991 |
| 9 | 112986526834 |
| 10 | 91234232847938 |
| 11 | 161113616883239406 |
| 12 | 619495336824891912596 |
| 13 | 5839092706931985694730356 |
| 14 | 124192664709851995516427897172 |
| 15 | 5681764626723349386531457243004370 |
[1,3,10,71,1026,30912,2219946,339460991, 112986526834,91234232847938,161113616883239406, 619495336824891912596,5839092706931985694730356, 124192664709851995516427897172, 5681764626723349386531457243004370] |