The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 105 |
| 4 | 11025 |
| 5 | 5439105 |
| 6 | 11193473025 |
| 7 | 89273960290305 |
| 8 | 2926331900465537025 |
| 9 | 380704455834655419367425 |
| 10 | 200503685263248842050957082625 |
| 11 | 418936006416927720918846481798529025 |
| 12 | 3516831926000321799217446305276779638554625 |
[1,3,105,11025,5439105,11193473025,89273960290305, 2926331900465537025,380704455834655419367425, 200503685263248842050957082625, 418936006416927720918846481798529025, 3516831926000321799217446305276779638554625] |