The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 141 |
| 3 | 2893 |
| 4 | 73081 |
| 5 | 2200977 |
| 6 | 77189509 |
| 7 | 3095295861 |
| 8 | 139872233073 |
| 9 | 7039013063065 |
| 10 | 390656716635901 |
| 11 | 23714578436644509 |
| 12 | 1563646420268423401 |
| 13 | 111315499088924632353 |
| 14 | 8511391223995285616373 |
| 15 | 695805743909499121660357 |
[1,9,141,2893,73081,2200977,77189509,3095295861, 139872233073,7039013063065,390656716635901, 23714578436644509,1563646420268423401, 111315499088924632353,8511391223995285616373, 695805743909499121660357] |