The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 106 |
| 4 | 2801 |
| 5 | 132426 |
| 6 | 9705577 |
| 7 | 1015001954 |
| 8 | 143392421601 |
| 9 | 26298332570386 |
| 10 | 6074043257989001 |
| 11 | 1724846814877790682 |
| 12 | 590605908915568818769 |
| 13 | 239956225437223244619866 |
| 14 | 114123836188192016600789481 |
| 15 | 62808518765936960824453590226 |
| 16 | 39603421893790601518269204039617 |
[1,2,9,106,2801,132426,9705577,1015001954, 143392421601,26298332570386,6074043257989001, 1724846814877790682,590605908915568818769, 239956225437223244619866, 114123836188192016600789481, 62808518765936960824453590226, 39603421893790601518269204039617] |