The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 17 |
| 4 | 151 |
| 5 | 1901 |
| 6 | 31841 |
| 7 | 679243 |
| 8 | 17873349 |
| 9 | 566127595 |
| 10 | 21172659297 |
| 11 | 920475938637 |
| 12 | 45922819496273 |
| 13 | 2600893043805459 |
| 14 | 165687190863751905 |
| 15 | 11778064492639412479 |
| 16 | 927828923151187295125 |
| 17 | 80505341430961590290171 |
| 18 | 7652425565871036374257731 |
| 19 | 793045506373759916564428397 |
[1,1,3,17,151,1901,31841,679243,17873349, 566127595,21172659297,920475938637,45922819496273, 2600893043805459,165687190863751905, 11778064492639412479,927828923151187295125, 80505341430961590290171,7652425565871036374257731, 793045506373759916564428397] |