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 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 5 |
| 14 | 5 |
| 15 | 17 |
| 16 | 17 |
| 17 | 37 |
| 18 | 37 |
| 19 | 81 |
| 20 | 81 |
| 21 | 581 |
| 22 | 581 |
[1,1,1,1,1,1,1,1,1,1,1,1,5,5,17,17,37,37,81,81, 581,581] |