The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 19 |
| 3 | 223 |
| 4 | 4667 |
| 5 | 160045 |
| 6 | 8207125 |
| 7 | 587420875 |
| 8 | 55869454855 |
| 9 | 6809387511403 |
| 10 | 1034264079708019 |
| 11 | 191477762192490649 |
| 12 | 42435372869814513769 |
| 13 | 11090351278621719882899 |
| 14 | 3374951549996881393302715 |
[1,3,19,223,4667,160045,8207125,587420875, 55869454855,6809387511403,1034264079708019, 191477762192490649,42435372869814513769, 11090351278621719882899,3374951549996881393302715] |