The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 33 |
| 3 | 663 |
| 4 | 18445 |
| 5 | 887313 |
| 6 | 84946015 |
| 7 | 3086525013 |
| 8 | 557027507463 |
| 9 | 31110090768183 |
| 10 | 3404401335645583 |
| 11 | 609352762511672905 |
[3,33,663,18445,887313,84946015,3086525013, 557027507463,31110090768183,3404401335645583, 609352762511672905] |