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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 1 |
| 4 | 25 |
| 5 | 1 |
| 6 | 721 |
| 7 | 1 |
| 8 | 6721 |
| 9 | 181441 |
| 10 | 151201 |
| 11 | 1 |
| 12 | 203575681 |
| 13 | 1 |
| 14 | 121080961 |
| 15 | 108972864001 |
| 16 | 3491282995201 |
| 17 | 1 |
| 18 | 133541574566401 |
| 19 | 1 |
| 20 | 304119455447808001 |
| 21 | 212878925715456001 |
| 22 | 309744468633601 |
| 23 | 1 |
| 24 | 17665560315112008499201 |
| 25 | 646300418472124416000001 |
| 26 | 841941782922240001 |
[1,1,3,1,25,1,721,1,6721,181441,151201,1, 203575681,1,121080961,108972864001,3491282995201, 1,133541574566401,1,304119455447808001, 212878925715456001,309744468633601,1, 17665560315112008499201,646300418472124416000001, 841941782922240001] |