The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 22 |
| 4 | 157 |
| 5 | 336 |
| 6 | 493 |
| 7 | 18084 |
| 8 | 18577 |
| 9 | 55238 |
| 10 | 405243 |
| 11 | 2891939 |
| 12 | 6189121 |
| 13 | 9081060 |
| 14 | 333107281 |
| 15 | 342188341 |
| 16 | 1017483963 |
| 17 | 7464576082 |
| 18 | 53269516537 |
| 19 | 114003609156 |
| 20 | 167273125693 |
| 21 | 6135836134104 |
| 22 | 6303109259797 |
| 23 | 18742054653698 |
| 24 | 137497491835683 |
| 25 | 981224497503479 |
[1,1,3,22,157,336,493,18084,18577,55238,405243, 2891939,6189121,9081060,333107281,342188341, 1017483963,7464576082,53269516537,114003609156, 167273125693,6135836134104,6303109259797, 18742054653698,137497491835683,981224497503479] |