The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 22 |
| 5 | 1 |
| 6 | 1 |
| 7 | 463 |
| 8 | 463 |
| 9 | 1 |
| 10 | 1 |
| 11 | 9724 |
| 12 | 204646 |
| 13 | 9724 |
| 14 | 1 |
| 15 | 1 |
| 16 | 204205 |
| 17 | 90258610 |
| 18 | 90258610 |
| 19 | 204205 |
| 20 | 1 |
| 21 | 1 |
| 22 | 4288306 |
| 23 | 39804251215 |
| 24 | 835975245820 |
| 25 | 39804251215 |
| 26 | 4288306 |
| 27 | 1 |
| 28 | 1 |
| 29 | 90054427 |
| 30 | 17553679074121 |
| 31 | 7742006555790235 |
[1,1,1,1,22,1,1,463,463,1,1,9724,204646,9724,1,1, 204205,90258610,90258610,204205,1,1,4288306, 39804251215,835975245820,39804251215,4288306,1,1, 90054427,17553679074121,7742006555790235] |