The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 61 |
| 4 | 277 |
| 5 | 50521 |
| 6 | 41581 |
| 7 | 199360981 |
| 8 | 228135437 |
| 9 | 2404879675441 |
| 10 | 14814847529501 |
| 11 | 69348874393137901 |
| 12 | 238685140977801337 |
| 13 | 4087072509293123892361 |
| 14 | 454540704683713199807 |
| 15 | 441543893249023104553682821 |
| 16 | 2088463430347521052196056349 |
[1,1,1,61,277,50521,41581,199360981,228135437, 2404879675441,14814847529501,69348874393137901, 238685140977801337,4087072509293123892361, 454540704683713199807,441543893249023104553682821, 2088463430347521052196056349] |