The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 121 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3249 |
| 7 | 1 |
| 8 | 1418481 |
| 9 | 1 |
| 10 | 243953161 |
| 11 | 18429849 |
| 12 | 61009 |
| 13 | 1 |
| 14 | 1 |
| 15 | 1026169 |
| 16 | 1 |
| 17 | 23298053769 |
| 18 | 1 |
| 19 | 103788925659225 |
| 20 | 228743149441 |
| 21 | 16670889 |
| 22 | 1 |
| 23 | 179167257871956225 |
| 24 | 1 |
| 25 | 164949400968114956769 |
| 26 | 6613857814673730625 |
[1,1,121,1,1,3249,1,1418481,1,243953161,18429849, 61009,1,1,1026169,1,23298053769,1,103788925659225, 228743149441,16670889,1,179167257871956225,1, 164949400968114956769,6613857814673730625] |