The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 26 |
| 4 | 471 |
| 5 | 13953 |
| 6 | 627421 |
| 7 | 39873948 |
| 8 | 3406344237 |
| 9 | 376591685322 |
| 10 | 52319828460127 |
| 11 | 8922977163384085 |
| 12 | 1832831375530080986 |
| 13 | 446306812127457163805 |
| 14 | 127130280682997045232005 |
| 15 | 41881054710966221044222595 |
| 16 | 15800074329058136531647698779 |
[1,3,26,471,13953,627421,39873948,3406344237, 376591685322,52319828460127,8922977163384085, 1832831375530080986,446306812127457163805, 127130280682997045232005, 41881054710966221044222595, 15800074329058136531647698779] |