The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 17 |
| 10 | 17 |
| 11 | 53 |
| 12 | 53 |
| 13 | 349 |
| 14 | 349 |
| 15 | 4017 |
| 16 | 4017 |
| 17 | 76237 |
| 18 | 76237 |
| 19 | 2269673 |
| 20 | 2269673 |
| 21 | 85654393 |
| 22 | 85654393 |
[1,1,1,1,1,1,1,1,17,17,53,53,349,349,4017,4017, 76237,76237,2269673,2269673,85654393,85654393] |