The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 99 |
| 3 | 9237 |
| 4 | 775971 |
| 5 | 83118753 |
| 6 | 10657602909 |
| 7 | 1463886204147 |
| 8 | 215566192274211 |
| 9 | 33677584957306713 |
| 10 | 5492032622227428849 |
| 11 | 928229455634614797447 |
| 12 | 161727023896151286167901 |
| 13 | 28905146810167510775300463 |
[1,3,99,9237,775971,83118753,10657602909, 1463886204147,215566192274211,33677584957306713, 5492032622227428849,928229455634614797447, 161727023896151286167901, 28905146810167510775300463] |