The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 33 |
| 4 | 1485 |
| 5 | 292545 |
| 6 | 264168135 |
| 7 | 1130375449665 |
| 8 | 23503896724884345 |
| 9 | 2422053053602606867905 |
| 10 | 1256704025339194996874320395 |
| 11 | 3326147448057830199712191898815585 |
| 12 | 45398150793225628820115544929795174823365 |
| 13 | 3225056167710201318911738099365978237877235350145 |
[1,1,3,33,1485,292545,264168135,1130375449665, 23503896724884345,2422053053602606867905, 1256704025339194996874320395, 3326147448057830199712191898815585, 45398150793225628820115544929795174823365, 3225056167710201318911738099365978237877235350145] |